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Take a look at these recently solved problems.
Are these statements relating to calculation and properties of shapes always true, sometimes true or never true?
Choose four of the numbers from 1 to 9 to put in the squares so that the differences between joined squares are odd.
In this activity, the computer chooses a times table and shifts it. Can you work out the table and the shift each time?
This multiplication uses each of the digits 0 - 9 once and once only. Using the information given, can you replace the stars in the calculation with figures?
Which pairs of cogs let the coloured tooth touch every tooth on the other cog? Which pairs do not let this happen? Why?