Fractions

There are 131 NRICH Mathematical resources connected to Fractions
Recurring Mean
problem

Recurring mean

Age
14 to 16
Challenge level
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What is the mean of 1.2 recurring and 2.1 recurring?
3388
problem

3388

Age
11 to 14
Challenge level
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Using some or all of the operations of addition, subtraction, multiplication and division and using the digits 3, 3, 8 and 8 each once and only once make an expression equal to 24.
Canny Fraction
problem

Canny fraction

Age
14 to 16
Challenge level
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What fraction of the volume of this can is filled with lemonade?
Once Upon a Time
problem

Once upon a time

Age
7 to 11
Challenge level
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Can you work out the height of Baby Bear's chair and whose bed is whose if all the things the three bears have are in the same proportions?
Information Display
problem

Information display

Age
11 to 14
Challenge level
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The information display on a train shows letters by illuminating dots in a rectangular array. What fraction of the dots in this array is illuminated?
Bull's Eye
problem

Bull's eye

Age
11 to 14
Challenge level
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What fractions of the largest circle are the two shaded regions?
Couples
problem

Couples

Age
11 to 14
Challenge level
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In a certain community two thirds of the adult men are married to three quarters of the adult women. How many adults would there be in the smallest community of this type?
Rationals Between...
problem

Rationals between...

Age
14 to 16
Challenge level
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What fractions can you find between the square roots of 65 and 67?
Unit fractions
problem

Unit fractions

Age
11 to 14
Challenge level
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Consider the equation 1/a + 1/b + 1/c = 1 where a, b and c are natural numbers and 0 < a < b < c. Prove that there is only one set of values which satisfy this equation.
Family Fortune
problem

Family fortune

Age
11 to 14
Challenge level
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If three brothers will get £20 more if they do not share their money with their sister, how much money is there?