Alex confidence puzzle


Alex brings his school supplies to the counter. The cashier rings up his purchase for a total of $1.70.
Alex is puzzled, and says,I bought

  • 2 pencils at 2 cents each,
  • 5 pencils at 4 cents each and
  • 8 notebooks and
  • 12 sheets of colored paper.

I don’t remember the prices of the latter two, but the total can’t be $1.70.

How did Alex know and is quite sure?

school-supplies puzzle

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  • 1 Answer(s)
    Best answer

    Price of later two according to cashier must be 146 cents but since a product cannot have a price which is not a multiple of cent and price of 8 notebooks and 12 sheets have to  be multiple of 4 ..assuming you can buy one piece of  both things.

    146 cents is not multiple of 4, hence not possible.

    Yodha Expert Answered on 9th May 2016.
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