by David Shaw, 21 March 2018 | 5 comments
You’ve just received a secret coded message: AD, BA, BH, CE, DB, DI, EF You know it follows a pattern, but can you work out what pair of letters come next?
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by David Shaw, 7 March 2018 | 2 comments
1936 is a square number. That means you can make it by multiplying a whole number by itself: 1936 = 44 x 44
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