Perplexity

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Today is 12 April, or to put it another way, 12.4.97. Now

12 + 4 = 9 + 7 (or you may prefer 1 x 2 - 4 + 9 = 7). Yesterday, - 1 - 14 + 9 = 7, and tomorrow 1 - 3 + 4 = 9 - 7.

The question is: which dates in April cannot be turned into correct sums without changing the order of the digits?

Rules: No zeroes before single digits. Permitted signs are +, -, x, , =, raising to a power, and decimal point. A prize of the new Chambers 21st Dictionary will be awarded to the first set of sums identifying the impossible dates, when we open entries on St George's Day. Answers to: Perplexity, The Independent, 1 Canada Square, Canary Wharf, London E14 5DL

29 March answers:

Burglary (gray blur), Manslaughter (maths granule)

Misdemeanour (resume domain)

Winner: G W Perkins (Langport, Somerset)

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