You may also like
Squaring the Circle
Bluey-green, white and transparent squares with a few odd bits of shapes around the perimeter. But, how many squares are there of each type in the complete circle? Study the picture and make an estimate.
All in a Jumble
My measurements have got all jumbled up! Swap them around and see if you can find a combination where every measurement is valid.
Age 11 to 14 Short
Challenge Level
Which of the following numbers could replace $x$ so that the value of $\frac{x}{5}$ lies between 3 and 4?
$$ 3.2 \qquad \qquad 14 \qquad \qquad 19$$
If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.
This problem is taken from the UKMT Mathematical Challenges.
You can find more short problems, arranged by curriculum topic, in our short problems collection.
Copyright © 1997 - 2022. University of Cambridge.
All rights reserved.
NRICH is part of the family of activities in the Millennium Mathematics Project.
NRICH is part of the family of activities in the Millennium Mathematics Project.