### There are 19 results

Broad Topics >

Fractions, Decimals, Percentages, Ratio and Proportion > Ratio

##### Age 11 to 14 Challenge Level:

Points P, Q, R and S each divide the sides AB, BC, CD and DA respectively in the ratio of 2 : 1. Join the points. What is the area of the parallelogram PQRS in relation to the original rectangle?

##### Age 7 to 11 Challenge Level:

Use the ratio of cashew nuts to peanuts to find out how many
peanuts Rachel has. What would the ratio be if Rachel and Marianne
mixed their bags?

##### Age 11 to 16 Challenge Level:

A Sudoku with clues as ratios or fractions.

##### Age 7 to 11 Challenge Level:

Use the Cuisenaire rods environment to investigate ratio. Can you
find pairs of rods in the ratio 3:2? How about 9:6?

##### Age 7 to 11 Challenge Level:

A card pairing game involving knowledge of simple ratio.

##### Age 11 to 16 Challenge Level:

Match pairs of cards so that they have equivalent ratios.

##### Age 11 to 14 Challenge Level:

A decorator can buy pink paint from two manufacturers. What is the
least number he would need of each type in order to produce
different shades of pink.

##### Age 11 to 14 Challenge Level:

In a race the odds are: 2 to 1 against the rhinoceros winning and 3 to 2 against the hippopotamus winning. What are the odds against the elephant winning if the race is fair?

##### Age 11 to 16 Challenge Level:

A Sudoku with clues as ratios.

##### Age 11 to 16 Challenge Level:

A Sudoku with clues as ratios.

##### Age 11 to 14 Challenge Level:

Can you work out which drink has the stronger flavour?

##### Age 11 to 14 Short Challenge Level:

How long will it take Mary and Nigel to wash an elephant if they work together?

##### Age 11 to 14 Challenge Level:

At the beginning of the night three poker players; Alan, Bernie and Craig had money in the ratios 7 : 6 : 5. At the end of the night the ratio was 6 : 5 : 4. One of them won $1 200. What were the. . . .

##### Age 11 to 14 Challenge Level:

A farmer is supplying a mix of seeds, nuts and dried apricots to a
manufacturer of crunchy cereal bars. What combination of
ingredients costing £5 per kg could he supply?

##### Age 7 to 14

An article for teachers which discusses the differences between
ratio and proportion, and invites readers to contribute their own
thoughts.

##### Age 11 to 14 Challenge Level:

If the sides of the triangle in the diagram are 3, 4 and 5, what is
the area of the shaded square?

##### Age 11 to 14 Challenge Level:

A garrison of 600 men has just enough bread ... but, with the news
that the enemy was planning an attack... How many ounces of bread a
day must each man in the garrison be allowed, to hold out 45. . . .

##### Age 7 to 11 Challenge Level:

The triangles in these sets are similar - can you work out the
lengths of the sides which have question marks?

##### Age 7 to 14

Read all about the number pi and the mathematicians who have tried to find out its value as accurately as possible.