DAY 208

Today’s Challenge

This puzzle invites you to use seven 2’s (2, 2, 2, 2, 2, 2 and 2) with + – × ÷ available.

For instance, to make 1 and 2 you could simply do:

  •  2 + (2÷2)  (2÷2)  (2÷2)  =  1
  •  2 + 2 + 2 + 2  2  2  2  =  2

Can you show how you can use seven 2’s to make 3, 4, and 5?

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The 7puzzle Challenge

The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to 84.

The 2nd & 5th rows of the playing board contain the following fourteen numbers:

6     7     8     16     17     21     28     48     50     55     63     64     81     84

Which four numbers, when 2 is added to them, each become multiples of 5?

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Answers

. . . can be found when clicking this.

7puzzleblog

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