Math review unit 1 and 2 (Integers and Algebra)

Work out -2 × -3

Find the highest common factor of 100 and 140

Find the lowest common multiple of 100 and 140

2⁷=128.Use this fact to find 2⁸

Choose the square numbers in this list

• 1

• -64

• 49

• 121

64 = 4³ and 1024 = 4⁵

Choose the answer to these calculations in index form. 64 x 1024

• 4⁷

• 4⁹

• 4¹⁰

• 4⁸

Find the possible values of n when n² = 25

Lara thinks of a number x. Write an expression for the number Lara gets when she multiplies the number by 5 then subtracts 2.

Lara thinks of a number x. Write an expression for the number Lara gets when she adds 20 to the number then divides by 5.

Work out the value of this expression.

2p + 5 when p = -4