Unmultiply is a game of quick estimation. You need to find two numbers that multiply together to something close to the given target - fast! 10 levels with a high scores table.
This activity challenges you to decide on the 'best' number to use in each statement. You may need to do some estimating, some calculating and some research.
Who said that adding, subtracting, multiplying and dividing
couldn't be fun?
There are nasty versions of this dice game but we'll start with the nice ones...
Examine these estimates. Do they sound about right?
How might you use mathematics to improve your chances of guessing the number of sweets in a jar?
Four Go game for an adult and child. Will you be the first to have four numbers in a row on the number line?
Some Games That May Be Nice or Nasty for an adult and child. Use your knowledge of place value to beat your opponent.
Dicey Operations for an adult and child. Can you get close to 1000 than your partner?
Here is a chance to play a version of the classic Countdown Game.
What do you notice about the date 03.06.09? Or 08.01.09? This
challenge invites you to investigate some interesting dates
Find the exact difference between the largest ball and the smallest
ball on the Hepta Tree and then use this to work out the MAGIC
This challenge is a game for two players. Choose two numbers from the grid and multiply or divide, then mark your answer on the number line. Can you get four in a row before your partner?
Can you deduce the pattern that has been used to lay out these
Bluey-green, white and transparent squares with a few odd bits of
shapes around the perimeter. But, how many squares are there of
each type in the complete circle? Study the picture and make. . . .
Can you work out how many of each kind of pencil this student
Sissa cleverly asked the King for a reward that sounded quite modest but turned out to be rather large...
Make an estimate of how many light fittings you can see. Was your
estimate a good one? How can you decide?
There are four equal weights on one side of the scale and an apple
on the other side. What can you say that is true about the apple
and the weights from the picture?
Mr. Sunshine tells the children they will have 2 hours of homework.
After several calculations, Harry says he hasn't got time to do
this homework. Can you see where his reasoning is wrong?