multiplicative change | Baamboozle - Baamboozle | The Most Fun Classroom Games!

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A phone costs £200. It increases by 25%. What is the new price?

£250, £225, £240, £260

A £50 jacket goes up by 10%. What is the new price?

£55, £60, £52, £57

A number doubles every step. What comes after 40?

80, 60, 70, 100

Which of these shows multiplicative change?

2, 4, 8, 16, 3, 6, 9, 12, 5, 10, 15, 20, 7, 11, 15, 19

Simplify the ratio 12 : 18?

2 : 3, 3 : 2, 6 : 9, 4 : 5

A population of 100 doubles each year. How many after 3 years?

800, 200, 400, 600

£60 is reduced by 10%. What is the new price?

£54, £50, £52, £56

Share 35 in the ratio 2 : 3?

14 : 21, 20 : 15, 12 : 23, 17 : 18

A jumper costs £40. It increases by 25%. What is the new price?

£50, £60, £45, £55

A bacteria triples each hour starting with 10. How many after 2 hours?

90, 20, 30, 60

Write the ratio 49 : 14 in simplest form?

7 : 2, 2 : 7, 14 : 49, 5 : 3

If £1 = $2, how many dollars is £7?

$14, $12, $15, $16

If 8 oranges cost £4, how much do 2 oranges cost?

£1, £2, 50p, £1.50

Share 30 sweets in the ratio 2 : 3?

12 : 18, 15 : 15, 20 : 10, 10 : 20

Share 42 in the ratio 1 : 8 : 5?

3 : 24 : 15, 6 : 18 : 18, 10 : 20 : 12, 5 : 15 : 22

If £1 = €1.20, how many euros is £10?

€12, €10, €11, €14

If 3 : 2 is the ratio of red to blue counters and there are 12 reds, how many blues?

8, 6, 10, 12

Simplify the ratio 20 : 30?

2 : 3, 3 : 2, 5 : 6, 10 : 20

If a price of £20 increases by 50%, what is the new price?

£30, £25, £35, £40

A car worth £200 loses 20% each year. Value after 3 years?

£102.40, £120, £128, £144

Which graph shows direct proportion?

A straight line through the origin, A curved line, A line not through the origin, A horizontal line

A ticket costs £72 after a 20% increase. What was the original price?

£60, £62, £64, £66

If a toy costs £15 and is reduced by 20%, what is the new price?

£12, £10, £11, £13

If £1 = 90 rupees, how many rupees is £5?

450, 400, 500, 420

If £1 = $1.25, how many dollars is £32?

$40, $42, $36, $50

1 mile ≈ 1.6 km. How many km is 5 miles?

8 km, 6 km, 7.5 km, 9 km

A rectangle is 4 cm by 6 cm. It is enlarged by scale factor 2. What are the new sides?

8 cm by 12 cm, 6 cm by 8 cm, 10 cm by 12 cm, 7 cm by 9 cm

Simplify the ratio 16 : 8?

2 : 1, 1 : 2, 4 : 8, 8 : 16

A shape has sides 5 cm. Enlarged by scale factor 3, what are the new sides?

15 cm, 12 cm, 10 cm, 18 cm

A £40 phone drops in price by 25%. What is the new price?

£30, £20, £28, £25

A car is worth £1000. It loses 50% of its value. What is it worth now?

£500, £600, £400, £700