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Number Round Up

Arrange the numbers 1 to 6 in each set of circles below. The sum of each side of the triangle should equal the number in its centre.

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Grouping Goodies

Pat counts her sweets in different groups and both times she has some left over. How many sweets could she have had?

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Red Even

You have 4 red and 5 blue counters. How many ways can they be placed on a 3 by 3 grid so that all the rows columns and diagonals have an even number of red counters?

Number Detective

Age 5 to 11 Challenge Level:

Which clue will you use first?
Is there some way you could sort the numbers that would help?