1 out of 3
Without doing lots of calculations, can you decide which of these number sentences are true? How do you know?
Follow the mathematical journey of a sixth-former as she spent four weeks working on stemNRICH problems.
2 out of 3
2 out of 3
In this follow-up to the problem Odds and Evens, we invite you to analyse a probability situation in order to find the general solution for a fair game.
1 out of 3
In this investigation we are going to count the number of 1s, 2s, 3s etc in numbers. Can you predict what will happen?
2 out of 3
On a farm there were some hens and sheep. Altogether there were 8 heads and 22 feet. How many hens were there?
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How many different triangles can you draw which each have one dot in the middle?
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How many possible symmetrical necklaces can you find? How do you know you've found them all?
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Does this 'trick' for calculating multiples of 11 always work? Why or why not?
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What is the smallest number of answers you need to reveal in order to work out the missing headers?
