Fractions

There are 129 NRICH Mathematical resources connected to Fractions
Fraction Match
problem

Fraction Match

Age
5 to 11
Challenge level
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A task which depends on members of the group noticing the needs of others and responding.
Mixing Lemonade
problem

Mixing Lemonade

Age
11 to 14
Challenge level
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Can you work out which drink has the stronger flavour?
Diminishing Returns
problem

Diminishing Returns

Age
11 to 14
Challenge level
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How much of the square is coloured blue? How will the pattern continue?
Reductant ratios
problem

Reductant ratios

Age
16 to 18
Challenge level
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What does the empirical formula of this mixture of iron oxides tell you about its consituents?
the greedy algorithm
problem

the greedy algorithm

Age
11 to 14
Challenge level
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The Egyptians expressed all fractions as the sum of different unit fractions. The Greedy Algorithm might provide us with an efficient way of doing this.
Keep it simple
problem

Keep it simple

Age
11 to 14
Challenge level
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Can all unit fractions be written as the sum of two unit fractions?
The genes of Gilgamesh
problem

The genes of Gilgamesh

Age
14 to 16
Challenge level
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Can you work out the parentage of the ancient hero Gilgamesh?
Counting Fish
problem

Counting Fish

Age
14 to 16
Challenge level
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I need a figure for the fish population in a lake. How does it help to catch and mark 40 fish?
All tangled up
problem

All tangled up

Age
14 to 18
Challenge level
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Can you tangle yourself up and reach any fraction?