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The number 2.525252525252.... can be written as a fraction. What is the sum of the denominator and numerator?

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Sept 03

What is the last digit of the number 1 / 5^903 ?

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Too Close to Call

Weekly Problem 24 - 2012
Can you put these very close fractions into order?

Fractions Jigsaw

Age 11 to 14 Challenge Level:

You will need to download and print out this jigsaw (or draw the pieces on squared paper), and cut up the pieces into squares (don't cut along the diagonal lines!).

wonky tile 1wonky tile 2wonky tile 3

Now try to put the square pieces together without rotating any of them (so that in the finished jigsaw all the numbers are the right way up).

Two pieces may only go next to each other if the edges that touch contain fractions that are equivalent.