Move one match

Matchtrick 1

By moving one matchstick only and not using it to go diagonally across the equals sign, make this equation correct.

One solution:  XV + V = XX

If you know it – sssssssh!

7 comments for “Move one match

  1. January 27, 2010 at 20:18

    XV+V=XX

  2. January 27, 2010 at 20:54

    Had to be one party pooper, didn’t there?

  3. January 27, 2010 at 21:18

    I was just coming here to to exactly that, James, having worked it out – he beat me by about an hour!

  4. January 27, 2010 at 21:19

    They’re all effing getting it first go. I just had a phone call with the answer and that’s the truth. 🙂

  5. January 27, 2010 at 21:19

    And I worked it out?!!! Make that about 20 minutes – duh!

  6. January 27, 2010 at 21:21

    Darn it – I was right the first time!

  7. January 28, 2010 at 01:41

    Took me all of 20 seconds.

    Since the cat is already out of the bag, I’ll show my working, as they say in the exam papers. If one can move only one match, it has to be a vertical or a horizontal one, becasue moving any of the others will mean they are no longer numbers. There are thus only two possibilities, and only one of them is right.

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