Making 24
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Transcript of Making 24
Making 24Author(s): John BerrySource: Mathematics in School, Vol. 36, No. 1 (Jan., 2007), p. 34Published by: The Mathematical AssociationStable URL: http://www.jstor.org/stable/30215989 .
Accessed: 27/09/2013 06:33
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This content downloaded from 152.14.136.96 on Fri, 27 Sep 2013 06:33:53 AMAll use subject to JSTOR Terms and Conditions
making 24
by John Berry
This puzzle provides a nice warm-up activity for students from Primary through to the sixth form as a way of getting the brain in gear and as a way of encouraging working in pairs. The rules are quite simple:
Be careful! Do not muddle up 6's and 9's. The base of the digit is towards the centre. M
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Use all four numbers only once to make the number 24 using the operations of arithmetic: adding, subtracting, multiplying and/or dividing. Each number must be used once and only once!
Keywords: Puzzles; Maths lesson starters.
Author John Berry, The Centre for Teaching Mathematics, The University of Plymouth, Plymouth, Devon PL4 8AA. e-mail: [email protected]
34 Mathematics in School, January 2007 The MA web site www.m-a.org.uk
This content downloaded from 152.14.136.96 on Fri, 27 Sep 2013 06:33:53 AMAll use subject to JSTOR Terms and Conditions