2012 math field day mental arithmetic no calculators no pencil/paper computation
DESCRIPTION
2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/1.jpg)
2012 MATH FIELD DAYMENTAL ARITHMETIC
No CalculatorsNo Pencil/Paper Computation
There are 20 questions on the test. Each one will be flashed on the screen for 25 seconds and read aloud. At the end of this time, the monitor will say, “Write down your answer.” At this time you may pick up your pencil and write your answer. Then put your pencil back down.
The first 15 problems are multiple answer. Be sure to write A, B, C, D, or E, not a number. The last 5 problems require a number.
![Page 2: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/2.jpg)
1. 80 is to 96 as what number is to 120?
A.64 B.90 C. 100 D.104E.Not enough information is given
![Page 3: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/3.jpg)
A. 531×42B. 532×41C. 541×32D. 542×31E. The products are all the same.
2. Which of these products are largest?
![Page 4: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/4.jpg)
3. Which number listed has an odd number of factors?
A. 18B. 27C. 35D. 49E. 57
![Page 5: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/5.jpg)
A. 2345B. 23,456C. 234,567D. 2,345,678E. 23,456,789
4. Which number is a multiple of 9?
![Page 6: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/6.jpg)
5. Which number is closest to 1?
A. B. C. D. E.
1211111213121213The numbers are equally close to 1.
![Page 7: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/7.jpg)
A. π : 4π B. π :4C. 1:4D. 1:2E. Not enough information is given.
6. Two cylinders of the same height have volumes given by 100π cm3 and 400π cm3 ? Their radii have ratio
![Page 8: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/8.jpg)
7. Take 20 percent off of 20 percent of the quotient of 20 and the reciprocal of 20. The resulting number is
A. 0.16B. 4C. 16D. 40E. 64
![Page 9: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/9.jpg)
A. 1sB. 10sC. 100sD. 1000sE. 10000s
8. What is the rightmost position in which a nonzero digit occurs in the product 1×2×3×4×5×6×7×8×9×10 ?
![Page 10: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/10.jpg)
9. Find the sum of all the three digit numbers whose three digits are each one of 1, 3, and 6:
A. 2000
B. 2110
C. 2220
D. 2440
E. 2550
![Page 11: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/11.jpg)
10. What is the sum of 1-2+3-4+5-6+7-…+17?
A. -8B. 0C. 1D. 8E. 9
![Page 12: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/12.jpg)
11. Compute the quotient:
A. 2 B. 10C. 24D. 200E. 1024
2 4 6 8 10 12 14 16 18 201 2 3 4 5 6 7 8 9 10
![Page 13: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/13.jpg)
12. A rectangular prism has width and length that are both 10 times the height. If the volume of the prism is 3000 cubic units, what is the height to the nearest whole number?
A. 2 unitsB. 3 unitsC. 4 unitsD. 5 unitsE. 6 units
![Page 14: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/14.jpg)
13. France 211,207 mi2 Spain 194,896 mi2 Sweden 173,731 mi2 Finland 130,119 mi2 Norway 125,181 mi2 Which statement is true?
A. Sweden is less than 40,000 mi2 larger than Finland.
B. France is more than twice the size of NorwayC. Spain is about 21,000 mi2 larger than Sweden.D. France is more than 100,000 mi2 larger than
Norway.E. All statements are false.
![Page 15: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/15.jpg)
14. Select the one prime number.
A. 213
B. 401
C. 171
D. 2001
E. 2013
![Page 16: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/16.jpg)
15. What is the next number in the sequence?59, 81, 140, 221, 361, _____
A. 401B. 409C. 442D. 541E. 582
![Page 17: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/17.jpg)
16. Start with the number of pints in a gallon, multiply by the number of inches in a foot, subtract the number of letters in the alphabet, then divide by the number of digits in a zip code.
![Page 18: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/18.jpg)
17. Apples normally sell for $0.32 each. They go on sale 3 for $0.69 each. How much money is saved if you purchase 2 dozen apples while they are on sale?
![Page 19: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/19.jpg)
18. I am thinking of a number. If I divide by 13, then multiply by 12, then subtract 20 and finally add 89, I end up with 93. What was my original number?
![Page 20: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/20.jpg)
19. Start with the number 9876. Reverse the digits and subtract. Sort the digits from largest to smallest. What is the resulting number?
![Page 21: 2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation](https://reader033.vdocument.in/reader033/viewer/2022051700/56815f48550346895dce2513/html5/thumbnails/21.jpg)
20. What is the sum of all the digits on a standard 12 hour clock?