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Broad Topics >

Fractions, Decimals, Percentages, Ratio and Proportion > Mixed fractions, decimals and percentages

##### 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 11 to 14 Challenge Level:

A train leaves on time. After it has gone 8 miles (at 33mph) the driver looks at his watch and sees that the hour hand is exactly over the minute hand. When did the train leave the station?

##### 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.

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

When I type a sequence of letters my calculator gives the product
of all the numbers in the corresponding memories. What numbers
should I store so that when I type 'ONE' it returns 1, and when I
type. . . .