chapter 1: numbers, factors & multiples 1 -numbers.pdf · possible factors, i.e., 1 and the...
TRANSCRIPT
![Page 1: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/1.jpg)
Numbers, Factors & Multiples
![Page 2: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/2.jpg)
Numbers
On a mobile phone
On a remote control
On a calculator
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Types of Numbers
1.Even numbers
2.Odd numbers
3.Prime numbers
4.Composite numbers
5.Square numbers
6.Triangular numbers
![Page 4: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/4.jpg)
Even Numbers
Even numbers are numbers which are exactly divisible by 2.
Even numbers are numbers which end with 0, 2, 4, 6, and 8.
Examples of even numbers are: 10, 22, 68, 46, 1004 and so on.
![Page 5: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/5.jpg)
Example
Ring the even numbers from the list given below:
34, 67, 88, 100, 54, 103,
145, 90, 52
![Page 6: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/6.jpg)
Example
Ring the even numbers from the list given below:
34, 67, 88, 100, 54, 103,
145, 90, 52
![Page 7: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/7.jpg)
Example
Ring the even numbers from the list given below:
34, 67, 88, 100, 54, 103,
145, 90, 52
![Page 8: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/8.jpg)
Example
Ring the even numbers from the list given below:
34, 67, 88, 100, 54, 103,
145, 90, 52
![Page 9: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/9.jpg)
Example
Ring the even numbers from the list given below:
34, 67, 88, 100, 54, 103,
145, 90, 52
![Page 10: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/10.jpg)
Example
Ring the even numbers from the list given below:
34, 67, 88, 100, 54, 103,
145, 90, 52
![Page 11: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/11.jpg)
Example
Ring the even numbers from the list given below:
34, 67, 88, 100, 54, 103,
145, 90, 52
![Page 12: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/12.jpg)
Odd Numbers
Odd numbers are numbers which are not exactly divisible by 2.
They leave a remainder of 1 when divided by 2.
![Page 13: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/13.jpg)
Odd Numbers
Odd numbers end with 1, 3, 5, 7 or 9.
Examples are 3, 15, 27, 39,61 and so on.
![Page 14: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/14.jpg)
Example
Circle the correct odd numbers from the list given.
123, 456, 789, 1 009, 561,
394, 555, 20 357
![Page 15: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/15.jpg)
Example
Circle the correct odd numbers from the list given.
123, 456, 789, 1 009, 561,
394, 555, 20 357
![Page 16: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/16.jpg)
Example
Circle the correct odd numbers from the list given.
123, 456, 789, 1 009, 561,
394, 555, 20 357
![Page 17: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/17.jpg)
Example
Circle the correct odd numbers from the list given.
123, 456, 789, 1 009, 561,
394, 555, 20 357
![Page 18: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/18.jpg)
Example
Circle the correct odd numbers from the list given.
123, 456, 789, 1 009, 561,
394, 555, 20 357
![Page 19: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/19.jpg)
Example
Circle the correct odd numbers from the list given.
123, 456, 789, 1 009, 561,
394, 555, 20 357
![Page 20: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/20.jpg)
Example
Circle the correct odd numbers from the list given.
123, 456, 789, 1 009, 561,
394, 555, 20 357
![Page 21: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/21.jpg)
Prime Numbers
A prime number is a number that is divisible by 1 and itself.
In other words, it has only 2 distinct factors.
Examples are 13, 29, 37, …
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Is 2 a prime number?
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2 is a prime number since it is divisible by 1 and 2.
2 has only 2 distinct factors.
2 is the only even number which is prime.
![Page 24: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/24.jpg)
Example:
Circle the prime numbers below:
19, 29, 39, 49, 59, 69, 79, 89, 99
![Page 25: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/25.jpg)
Example:
Circle the prime numbers below:
19, 29, 39, 49, 59, 69, 79, 89, 99
![Page 26: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/26.jpg)
Example:
Circle the prime numbers below:
19, 29, 39, 49, 59, 69, 79, 89, 99
![Page 27: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/27.jpg)
Example:
Circle the prime numbers below:
19, 29, 39, 49, 59, 69, 79, 89, 99
![Page 28: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/28.jpg)
Example:
Circle the prime numbers below:
19, 29, 39, 49, 59, 69, 79, 89, 99
![Page 29: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/29.jpg)
Example:
Circle the prime numbers below:
19, 29, 39, 49, 59, 69, 79, 89, 99
![Page 30: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/30.jpg)
Composite Numbers
A composite number is a number that has more than 2 factors.
Examples are 16, 44, 65, 100 and so on.
![Page 31: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/31.jpg)
Do you think 0 and 1 are prime numbers?
0 and 1 are neither prime nor composite numbers
![Page 32: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/32.jpg)
Example:
Which of the following are composite numbers?
1, 6, 9, 13, 15, 19, 28,
31, 51, 79, 91
![Page 33: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/33.jpg)
Example:
Which of the following are composite numbers?
1, 6, 9, 13, 15, 19, 28,
31, 51, 79, 91
![Page 34: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/34.jpg)
Example:
Which of the following are composite numbers?
1, 6, 9, 13, 15, 19, 28,
31, 51, 79, 91
![Page 35: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/35.jpg)
Example:
Which of the following are composite numbers?
1, 6, 9, 13, 15, 19, 28,
31, 51, 79, 91
![Page 36: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/36.jpg)
Example:
Which of the following are composite numbers?
1, 6, 9, 13, 15, 19, 28,
31, 51, 79, 91
![Page 37: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/37.jpg)
Example:
Which of the following are composite numbers?
1, 6, 9, 13, 15, 19, 28,
31, 51, 79, 91
![Page 38: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/38.jpg)
Example:
Which of the following are composite numbers?
1, 6, 9, 13, 15, 19, 28,
31, 51, 79, 91
![Page 39: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/39.jpg)
Square Numbers
When a whole number is multiplied by itself, the resulting answer is said to be a square number.
For example, 1 x 1 = 1, 2 x 2 = 4,
3 x 3 =9 , 8 x 8 =64 and so on.
So 1, 4, 9 and 64 are said to be square numbers.
![Page 40: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/40.jpg)
We can arrange a square number as
a square array of dots.
For example,
![Page 41: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/41.jpg)
Example:
Ring the square numbers from the list below.
45, 121, 64, 241, 1, 16,
169, 400, 2 000
![Page 42: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/42.jpg)
Example:
Ring the square numbers from the list below.
45, 121, 64, 241, 1, 16,
169, 400, 2 000
![Page 43: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/43.jpg)
Example:
Ring the square numbers from the list below.
45, 121, 64, 241, 1, 16,
169, 400, 2 000
![Page 44: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/44.jpg)
Example:
Ring the square numbers from the list below.
45, 121, 64, 241, 1, 16,
169, 400, 2 000
![Page 45: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/45.jpg)
Example:
Ring the square numbers from the list below.
45, 121, 64, 241, 1, 16,
169, 400, 2 000
![Page 46: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/46.jpg)
Example:
Ring the square numbers from the list below.
45, 121, 64, 241, 1, 16,
169, 400, 2 000
![Page 47: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/47.jpg)
Example:
Ring the square numbers from the list below.
45, 121, 64, 241, 1, 16,
169, 400, 2 000
![Page 48: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/48.jpg)
Example:
Which 1-digit square number is even?
![Page 49: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/49.jpg)
Have a look at this picture.
![Page 50: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/50.jpg)
Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5
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Figure 1 2 3 4 5
Number of cans
1 1 + 2 1 + 2 + 3 1 + 2 + 3 + 4 1 + 2 + 3 + 4 + 5
Triangular numbers
1 3 6 10 15
![Page 52: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/52.jpg)
Triangular Numbers
![Page 53: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/53.jpg)
Arrangements of oranges
![Page 54: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/54.jpg)
Triangular Numbers are
numbers which can be arranged in a triangular
pattern.
Recap
Types of
Numbers
Even Numbers: Exactly divisible
by 2Examples are 2, 34, 56, 78, 100
Odd Numbers: Leave a
remainder of 1 when divided by
2Examples are 31, 123, 455,
697, 789
Prime Numbers: Have only 2
possible factors, i.e., 1 and the number itself
Examples are 17, 23, 37 etc…
Square Numbers: A
number multiplied by itself gives a
square numberExamples are 4,
36, 81, 169 etc…
Composite Numbers: Have
more than 2 factors
Examples are 14, 39, 45, 66
etc…
![Page 55: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/55.jpg)
Practice Exercises
1. Ring the even numbers from the list: 98, 475, 358, 3 000, 699, 12 034, 1 978, 642.
2. Ring the odd numbers from the list below.
6, 15, 12, 27, 347, 2 153, 3 598,
4 559, 2 680, 27 681.
![Page 56: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/56.jpg)
Practice Exercises
3. Ring the numbers which are not prime : 11, 21, 31, 41, 51,
61, 71, 81, 91.
4. Ring all the numbers which are not composite.
1, 5, 8, 10, 17, 22, 25,
29, 31, 38, 42
![Page 57: Chapter 1: Numbers, Factors & Multiples 1 -Numbers.pdf · possible factors, i.e., 1 and the number itself Examples are 17, 23, 37 etc… Square Numbers: A number multiplied by itself](https://reader034.vdocument.in/reader034/viewer/2022042920/5f6656a16e9870633c66cdd3/html5/thumbnails/57.jpg)
Practice Exercises
5. Which even number is also a prime number?
6. Write down 5 consecutive prime numbers with 23 in the middle.
7. What is the smallest 2-digit composite number?
8. What is the largest 2-digit composite number?