Revision - Numbers

Work out:

5/7​ of 42

• 30

• 35

• 32

• 24

Calculate (8−2 × 5 + 4) ÷ 2

• 17

• 1

• -1

• 11

Round 26460 to two significant figures.

• 25000

• 27000

• 26

• 26000

Write 270000 in standard form.

• 27 × 10^4

• 2.7 × 10^4

• 2.7 × 10^5

• 0.27 × 10^6

60cm increased to 75cm.

Find the percentage increase.

• 27.5%

• 12.5%

• 25%

• 15%

Calculate the HCF of 54 and 60

• 540

• 36

• 6

• 2

Calculate the LCM of 24 and 32.

• 8

• 16

• 96

• 768

What is 16 as a product of its prime factors?

• 4 x 4

• 2^4

• 1, 2, 4, 8, 16

• 2 x 2 x 4

A musical requires 200 costumes. 140 costumes are allocated to the background dancers whilst the rest are for the starring roles.

Write the ratio of the costumes for starring roles to background dancers in the simplest form.

• 7 : 3

• 7 : 10

• 3 : 7

• 10 : 7

A car is bought for £15000. The car loses 10% of its value every year, compound interest.

Which calculation works out the total value after 5years?

• 15000 − 10 × 5

• (1500010) × 5

• 1.1^5 x 15000

• 15000 × 0.9^5