Ratios

3/10 of a bag of marbles are red, the rest are blue. What is the ratio of red to blue marbles?

• 3:7
• 3:10

• 7:10

• 7:3

60% of chocolates contain nuts, the rest do not. What is the ratio of chocolates with nuts to without?

• 60/100

• 60:40

• 60:100

• 40%

In a maths test 4/7 of the questions were on algebra, the rest were on geometry. What is the ratio of maths to geometry questions?

• 4:3
• 4:7

• 3:7

• 7:3

There are only red buttons, yellow buttons, and orange buttons in a jar.

The number of red buttons, the number of yellow buttons, and the number of orange buttons are in the ratio 7:4:9.

Work out what fraction of the buttons in the jar are orange.

A bag contains red counters and blue counters only. The number of red counters to the number of blue counters is 3:4. Write down the fraction of the counters that are red.

There are 30 children in a nursery school.

At least 1 adult is needed for every 8 children in the nursery.

Work out the least number of adults needed in the nursery.

• 2

• 3

• 4

• 5

Jamil makes a drink by mixing 1 part of orange squash with 9 parts of water.

He uses 750 millilitres of orange squash.

Jamil is going to put the drink he has mixed into 1 litre bottles.

Work out the greatest number of 1 litre bottles that Jamil can completely fill.

In a bag there are only red counters, blue counters, green counters, and yellow counters.

A counter is taken at random from the bag.

The table shows the probabilities of getting a red counter or a yellow counter.

The number of blue counters to the number of green counters is 3:4.

Complete the table.

d

e

0.3

0.25

0.1

0.2

0.35

0.15

Harry, Regan, and Kelan share £450 in the ratio 2:5:3.

How much money does Kelan get?

Tom and Niamh share £500 in the ratio 2:3, how much does each person receive?

• Tom

• £500

• Total

• £100

• Niamh

• £200

• One Part

• £300