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Sunday Times Teaser 2659 – Two by Two

by Peter G Chamberlain

The letters A to Z have each been given a different value between 0 and 25 inclusive in some order. Hence a three letter word could, for example, be represented by a number with three, four, five or six digits.

Using this representation it turns out that every digit in TWO is a prime and that TWO x TWO = FOUR.

What is the number FOUR?

3 Comments Leave one →
  1. brian gladman permalink

  2. tonysmith permalink

    It is not clear why 22 and 25 are not in line 24 – letter values in TWO are not constrained to be prime

  3. brian gladman permalink

    Hi Tony, Nice to see you back here! Good point, I’ll change it.

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