Brainteasers

22nd October 2004 at 01:00
Puzzles to test mathematical skills, set by Anita Straker. Solutions below More brainteasers on www.tes.co.ukteacherbrainteasers

Ages 7-11 Jigsaw puzzle

Take any trapezium.

Make just one straight cut across it.

Reassemble the pieces to make a parallelogram.

In how many different ways can you do this? Ages 10-14 All the eights

Show that eight 8s make 1000!

Put +, - , x, V or brackets in this equation

to make it true.

8 8 8 8 8 8 8 8

1000

SOLUTIONS Jigsaw puzzle 2 different ways. Join the mid-points of the non-parallel sides and cut across this line. All the eights 8 x (8 + 8) + 888 - 8 - 8 = 1000 or (8888 - 888) V 8 = 1000. There may be other solutions.

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