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#### Resources tagged with Calculating with percentages similar to One or Both:

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### There are 12 results

Broad Topics > Fractions, Decimals, Percentages, Ratio and Proportion > Calculating with percentages

### One or Both

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

Problem one was solved by 70% of the pupils. Problem 2 was solved by 60% of them. Every pupil solved at least one of the problems. Nine pupils solved both problems. How many pupils took the exam?

### Put Out the Flags

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

Tim and Beth both have a string of flags. Use the percentages to find out who has the most flags.

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

When Charlie retires, he's looking forward to the quiet life, whereas Alison wants a busy and exciting retirement. Can you advise them on where they should go?

### Percentage Unchanged

##### Age 14 to 16 Short Challenge Level:

If the base of a rectangle is increased by 10% and the area is unchanged, by what percentage is the width decreased by ?

### Trusting the Tabloids

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

Can you match the cards and figure out whether the tabloid headlines can be trusted?

### Mathland Election

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

A political commentator summed up an election result. Given that there were just four candidates and that the figures quoted were exact find the number of votes polled for each candidate.

### Pineapple Juice

##### Age 14 to 16 Short Challenge Level:

What percentage of this orange drink is juice?

### A Change in Code

##### Age 14 to 16 Challenge Level:

There are two sets of numbers. The second is the result of the first after an increase by a constant percentage. How can you find that percentage if one set of numbers is in code?

##### Age 14 to 16 Challenge Level:

If a sum invested gains 10% each year how long before it has doubled its value?

### CD Heaven

##### Age 14 to 16 Challenge Level:

All CD Heaven stores were given the same number of a popular CD to sell for £24. In their two week sale each store reduces the price of the CD by 25% ... How many CDs did the store sell at. . . .

### The Legacy

##### Age 14 to 16 Challenge Level:

Your school has been left a million pounds in the will of an ex- pupil. What model of investment and spending would you use in order to ensure the best return on the money?

### Roasting Old Chestnuts 4

##### Age 11 to 16

For teachers. Yet more school maths from long ago-interest and percentages.