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What is the smallest number of answers you need to reveal in order to work out the missing headers?
Play this game and see if you can figure out the computer's chosen number.
An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.
Can you use the clues to complete these 5 by 5 Mathematical Sudokus?
How many solutions can you find to this sum? Each of the different letters stands for a different number.
These eleven shapes each stand for a different number. Can you use the multiplication sums to work out what they are?
Can you find a way to identify times tables after they have been shifted up or down?
Using your knowledge of the properties of numbers, can you fill all the squares on the board?
Choose some fractions and add them together. Can you get close to 1?
If you are given the mean, median and mode of five positive whole numbers, can you find the numbers?
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?
Charlie has made a Magic V. Can you use his example to make some more? And how about Magic Ls, Ns and Ws?
How many different symmetrical shapes can you make by shading triangles or squares?
Each clue in this Sudoku is the product of the two numbers in adjacent cells.
Try entering different sets of numbers in the number pyramids. How does the total at the top change?
By selecting digits for an addition grid, what targets can you make?
Can you arrange the numbers 1 to 17 in a row so that each adjacent pair adds up to a square number?
Can you arrange these numbers into 7 subsets, each of three numbers, so that when the numbers in each are added together, they make seven consecutive numbers?
How many ways can you find to put in operation signs (+, −, ×, ÷) to make 100?
15 = 7 + 8 and 10 = 1 + 2 + 3 + 4. Can you say which numbers can be expressed as the sum of two or more consecutive integers?
Mathematicians are always looking for efficient methods for solving problems. How efficient can you be?
A 2 by 3 rectangle contains 8 squares and a 3 by 4 rectangle contains 20 squares. What size rectangle(s) contain(s) exactly 100 squares? Can you find them all?