2 out of 3
These pieces of wallpaper need to be ordered from smallest to largest. Can you find a way to do it?
3 out of 3
On a digital clock showing 24 hour time, over a whole day, how many times does a 5 appear? Is it the same number for a 12 hour clock over a whole day?
2 out of 3
Have a look at the results for some events at past Olympic Games. Can you use these to predict the results at the next Olympics?
2 out of 3
Find out why these matrices are magic. Can you work out how they were made? Can you make your own Magic Matrix?
1 out of 3
Four children were sharing a set of twenty-four butterfly cards. Are there any cards they all want? Are there any that none of them want?
2 out of 3
I am thinking of three sets of numbers less than 101. Can you find all the numbers in each set from these clues?
2 out of 3
Use the information to describe these marbles. What colours must be on marbles that sparkle when rolling but are dark inside?
2 out of 3
Can you arrange fifteen dominoes so that all the touching domino pieces add to 6 and the ends join up? Can you make all the joins add to 7?
The NRICH Team's beliefs about teaching mathematics, and the ideas that have inspired us.
1 out of 3
Think of a number, square it and subtract your starting number. Is the number you're left with odd or even? How do the images help to explain this?
