Decimals

There are 17 NRICH Mathematical resources connected to Decimals
Magic Matrix
problem

Magic Matrix

Age
7 to 11
Challenge level
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Find out why these matrices are magic. Can you work out how they were made? Can you make your own Magic Matrix?
Decimal Time
problem

Decimal Time

Age
11 to 14
Challenge level
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Use the clocks to investigate French decimal time in this problem. Can you see how this time system worked?
Repetitiously
problem

Repetitiously

Age
14 to 16
Challenge level
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Can you express every recurring decimal as a fraction?
Tiny Nines
problem

Tiny Nines

Age
14 to 16
Challenge level
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What do you notice about these families of recurring decimals?
Shopping Basket
problem

Shopping Basket

Age
11 to 16
Challenge level
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The items in the shopping basket add and multiply to give the same amount. What could their prices be?
Forgot the Numbers
problem

Forgot the Numbers

Age
7 to 11
Challenge level
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On my calculator I divided one whole number by another whole number and got the answer 3.125. If the numbers are both under 50, what are they?