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Posers and Puzzles

Posers and Puzzles

  1. 28 Dec '08 15:44 / 2 edits
    I'd like to create a thread specifically devoted to logic and numerical (not 'maths' puzzles as such, but ones requiring numerical reasoning) - the sorts of puzzles one might find in a book of brainteasers.

    Please post any interesting logic or numerical puzzles you know of/can find. Thanks

    I'll start the ball rolling:

    How many leap years will there be between 2001 and 3001? Remember that at the turn of a new century, years are only leap years if they are multiples of 400.
  2. 28 Dec '08 20:27
    Originally posted by skims
    I'd like to create a thread specifically devoted to logic and numerical (not 'maths' puzzles as such, but ones requiring numerical reasoning) - the sorts of puzzles one might find in a book of brainteasers.

    Please post any interesting logic or numerical puzzles you know of/can find. Thanks

    I'll start the ball rolling:

    How many leap years will there ...[text shortened]... r that at the turn of a new century, years are only leap years if they are multiples of 400.
    242?
  3. 28 Dec '08 20:37 / 1 edit
    Originally posted by chessmasterBG
    242?
    correct explain your answer?
  4. 28 Dec '08 20:40
    Originally posted by skims
    correct explain your answer?
    25 leap years in 100 years (100/4); 250 in a thousand (25*10)..
    and only 2 from 2001 to 3001 are multiples of 400 (2400, 2800), so subtract 8
    250-8 = 242
  5. 28 Dec '08 21:45
    Perfect well done!