Saturday, 09 September 2006 ©RSH

Number

Square and Cube Numbers

Saturday, 09 September 2006 ©RSH

Square Numbers• 2 x 2 =4, 3 x 3 = 9, 4 x 4 = 16 etc. • 4, 9, 16 are square numbers.• A square number can be written in the form

n x n (where n is an integer).• 25 is a square number because 25 = 5 x 5.

Square Numbers• 2 x 2 =4, 3 x 3 = 9, 4 x 4 = 16 etc. • 4, 9, 16 are square numbers.• A square number can be written in the form

n x n (where n is an integer).• 25 is a square number because 25 = 5 x 5.

Notes

Saturday, 09 September 2006 ©RSH

Cube Numbers• 2 x 2 x 2 =8, 3 x 3 x 3 = 27 etc. • 8 and 27 are cube numbers.• A cube number can be written in the form

n x n x n (where n is an integer).• 64 is a cube number because 64 = 4 x 4 x 4.

Cube Numbers• 2 x 2 x 2 =8, 3 x 3 x 3 = 27 etc. • 8 and 27 are cube numbers.• A cube number can be written in the form

n x n x n (where n is an integer).• 64 is a cube number because 64 = 4 x 4 x 4.

Notes

Saturday, 09 September 2006 ©RSH

Exercise

1. Write down the first 15 square numbers.

2. Write down the first five cube numbers.

1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225

8, 27, 64, 125, 216