Can you find six numbers to go in the daisy from which you can make all the numbers from 1 to a number bigger than 25?
Can you make a cycle of pairs that add to make a square number using all the numbers in the box below, once and once only?
Points A, B and C are the centres of three circles, each one of which touches the other two. Prove that the perimeter of the triangle ABC is equal to the diameter of the largest circle.
Find the missing distance in this diagram with two isosceles triangles
These challenges will help your understanding of number and place value.
How many ways can you find to put in operation signs (+, −, ×, ÷) to make 100?
Show that all pentagonal numbers are one third of a triangular number.
