List

Just Jottings (16-18)

Why 24?
problem
Favourite

Why 24?

Age
14 to 16
Challenge level
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Take any prime number greater than 3 , square it and subtract one. Working on the building blocks will help you to explain what is special about your results.
Dating made Easier
problem
Favourite

Dating made Easier

Age
14 to 16
Challenge level
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If a sum invested gains 10% each year how long before it has doubled its value?
Root hunter
problem
Favourite

Root hunter

Age
16 to 18
Challenge level
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In this short problem, try to find the location of the roots of some unusual functions by finding where they change sign.
Partly Circles
problem
Favourite

Partly Circles

Age
14 to 16
Challenge level
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What is the same and what is different about these circle questions? What connections can you make?
Curved square
problem
Favourite

Curved square

Age
16 to 18
Challenge level
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Can you find the area of the central part of this shape? Can you do it in more than one way?
Quick Sum
problem

Quick Sum

Age
16 to 18
Challenge level
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Is this surd sum exactly 3?