Play this game and see if you can figure out the computer's chosen number.
Can you select the missing digit(s) to find the largest multiple?
I'm thinking of a number. My number is both a multiple of 5 and a multiple of 6. What could my number be?
Play the divisibility game to create numbers in which the first two digits make a number divisible by 2, the first three digits make a number divisible by 3...
The flow chart requires two numbers, M and N. Select several values for M and try to establish what the flow chart does.
How many pairs of numbers can you find that add up to a multiple of 11? Do you notice anything interesting about your results?
Mathematicians are always looking for efficient methods for solving problems. How efficient can you be?
Imagine we have four bags containing a large number of 1s, 4s, 7s and 10s. What numbers can we make?
Is there an efficient way to work out how many factors a large number has?
