Think of a two digit number, reverse the digits, and add the numbers together. Something special happens...
Is there a quick way to work out whether a fraction terminates or recurs when you write it as a decimal?
Arrange the numbers 1 to 6 in each set of circles below. The sum of each side of the triangle should equal the number in its centre.
In this article for teachers, Liz Woodham describes conversations with Luke, aged 7, as they worked on some mathematics together.
Many numbers can be expressed as the difference of two perfect squares. What do you notice about the numbers you CANNOT make?
Think of a number and follow my instructions. Tell me your answer, and I'll tell you what you started with! Can you explain how I know?
A game in which players take it in turns to choose a number. Can you block your opponent?
Draw some quadrilaterals on a 9-point circle and work out the angles. Is there a theorem?
