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What Do you Need?
problem
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What Do You Need?

7 to 11

Four of these clues are needed to find the chosen number on this grid and four are true but do nothing to help in finding the number. Can you sort out the clues and find the number?

Satisfying Statements
problem

Satisfying Statements

11 to 14

Can you find any two-digit numbers that satisfy all of these statements?

Hypothetical shorts
problem

Hypothetical Shorts

16 to 18
Some short statements about hypothesis testing: are they true, false, or somewhere in between?
10 Olympic Starters
problem

10 Olympic Starters

16 to 18

10 intriguing starters related to the mechanics of sport.

The square top of a red gift box with a bow.
problem
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Square Number Surprises

14 to 16

There are unexpected discoveries to be made about square numbers...

Exploring cubic functions
problem
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Exploring Cubic Functions

14 to 18

Quadratic graphs are very familiar, but what patterns can you explore with cubics?

Symmetric Trace
problem

Symmetric Trace

14 to 16
Points off a rolling wheel make traces. What makes those traces have symmetry?
Placeholder: several colourful numbers
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stemNRICH FAQs

Quick FAQs regarding the stemNRICH area of the NRICH website

Small pepper seedlings in turquoise pots.
problem

Internal - External

14 to 16

Weekly Problem 12 - 2016
The diagram shows a square PQRS and two equilateral triangles RSU and PST. PQ has length 1. What is the length of TU?

The Legacy
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The Legacy

14 to 16

Your school has been left a million pounds in the will of an ex-pupil. What model of investment and spending would you use in order to ensure the best return on the money?

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