These eleven shapes each stand for a different number. Can you use the multiplication sums to work out what they are?
Can you work out the fraction of the original triangle that is covered by the green triangle?
Try out these calculations. Are you surprised by the results?
If you are given the mean, median and mode of five positive whole numbers, can you find the numbers?
This article outlines how strategy games can help children develop logical thinking, using examples from the NRICH website.
Take any four digit number. Move the first digit to the end and move the rest along. Now add your two numbers. Did you get a multiple of 11?
A polite number can be written as the sum of two or more consecutive positive integers, for example 8+9+10=27 is a polite number. Can you find some more polite, and impolite, numbers?
