Maths warm-up

A rectangle's area is 20 square cm. The width of the rectangle is 5cm. What is the length of the rectangle?

• 15cm

• 4cm

• 10cm

• 5cm

What is the square root of  $4^3$ ?

Tick all of the multiples of 17.5

• 34

• 52.5

• 63

• 380

• 70

How many prime numbers are there between 1 and 30?

• 9

• 12

• 10

• 11

• 13

(12  $\times$  2)  $\div$  6 +  $9^2$  

• 84

• 85

• 72

• 74

$163\times7$

What is the mean of these numbers. 5, 12, 8, 6, 5, 3, 9, 10, 3.

• 8

• 7

• 6

• 12

 $2y\ +\ 2y\ +\ 2y\ +2y\ =\ 24\$  
What is y?

• 6

• 3

• 4

• 5

How many faces are there on a regular pyramid?

• 3

• 4

• 5

• 6

How long is an average giraffe neck?

• 1.8 metres

• 2 metres

• 2.3 metres

• 1.5 cm