There are nasty versions of this dice game but we'll start with the nice ones...

Some Games That May Be Nice or Nasty for an adult and child. Use your knowledge of place value to beat your opponent.

Who said that adding, subtracting, multiplying and dividing couldn't be fun?

Dicey Operations for an adult and child. Can you get close to 1000 than your partner?

In this article for primary teachers, Ems outlines how we can encourage learners to be flexible in their approach to calculation, and why this is crucial.

How many ways can you find to put in operation signs (+ - x รท) to make 100?

Four Go game for an adult and child. Will you be the first to have four numbers in a row on the number line?

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 yourself.

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.

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?

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 NUMBER!

This challenge is a game for two players. Choose two of the numbers to multiply or divide, then mark your answer on the number line. Can you get four in a row?

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?

Can you work out how many of each kind of pencil this student bought?

Can you deduce the pattern that has been used to lay out these bottle tops?

Make an estimate of how many light fittings you can see. Was your estimate a good one? How can you decide?

Choose some fractions and add them together. Can you get close to 1?

How might you use mathematics to improve your chances of guessing the number of sweets in a jar?

These Olympic quantities have been jumbled up! Can you put them back together again?

From the information you are asked to work out where the picture was taken. Is there too much information? How accurate can your answer be?

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. . . .

Examine these estimates. Do they sound about right?

Can you rank these sets of quantities in order, from smallest to largest? Can you provide convincing evidence for your rankings?

How many teddies are in the jar? How many teddies could you fit in your classroom?

My measurements have got all jumbled up! Swap them around and see if you can find a combination where every measurement is valid.