BrainBashers - Brain Teasers and Puzzles

Puzzle 713

Hot is to freeze as

? is to melt?

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Puzzle 714

What letter comes next in this sequence:

M · A · M · J · J · ?

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Puzzle 715

Which is larger:

centimetres in a mile miles travelled by light in a second

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Puzzle 716

A Proof That 2 = 1. Let A = B:

           A = B

multiply by A on both sides:

         A x A = A x B

subtract B x B from both sides:

   A x A − B x B = A x B − B x B

factorise:

  (A + B)(A − B) = B(A − B)

divide by (A − B) on both sides:

       (A + B) = B

replace A with B:

         B + B = B

factorise:

          2B = B

divide by B on both sides:

           2 = 1

Where lies the flaw in the logic?

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