Brainteasers

14th January 2005 at 00:00
Puzzles to test mathematical skills, set by Anita Straker. Solutions below More brainteasers on www.tes.co.ukteacherbrainteasers

MAGIC BUTTERFLY

Use each of the numbers 1, 2, 3, 4, 5, 6, 7. Write one number in each circle.

The sum of the numbers in each line of three circles must add up to 12.

Find ways to do it.

COLOURED SQUARES

Emily colours 3 squares on this 4 by 4 grid.

The squares touch edge to edge.

In how many different ways can Emily colour the three squares?

Coloured squares (age 9-13) 52 ways: 8 ways: 8 ways: 9 ways: 9 ways: 9 ways: 9 ways:

SOLUTIONS Magic butterfly (age 7-11) Here are 3 solutions. Reflections or rotations are also possible.

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