Fractions

There are 129 NRICH Mathematical resources connected to Fractions
Fractional Triangles
problem

Fractional Triangles

Age
7 to 11
Challenge level
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Use the lines on this figure to show how the square can be divided into 2 halves, 3 thirds, 6 sixths and 9 ninths.
Light Blue - Dark Blue
problem

Light Blue - Dark Blue

Age
7 to 11
Challenge level
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Investigate the successive areas of light blue in these diagrams.
Farey Sequences
problem

Farey Sequences

Age
11 to 14
Challenge level
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There are lots of ideas to explore in these sequences of ordered fractions.
Modular Fractions
problem

Modular Fractions

Age
16 to 18
Challenge level
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We only need 7 numbers for modulus (or clock) arithmetic mod 7 including working with fractions. Explore how to divide numbers and write fractions in modulus arithemtic.
Hello Again
problem

Hello Again

Age
11 to 14
Challenge level
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Anne completes a circuit around a circular track in 40 seconds. Brenda runs in the opposite direction and meets Anne every 15 seconds. How long does it take Brenda to run around the track?
Smaller and Smaller
problem

Smaller and Smaller

Age
7 to 14
Challenge level
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Can you predict, without drawing, what the perimeter of the next shape in this pattern will be if we continue drawing them in the same way?
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?
Halving
problem

Halving

Age
5 to 7
Challenge level
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These pictures show squares split into halves. Can you find other ways?