DAY 255

Today’s Challenge

Here’s a 2-part, 7-step number trail involving all four arithmetical operations.

Part 1: Start with the number 15, then:

  • 1
  • +2
  • ×3
  • ÷4
  • +5
  • 6
  • ×7

What is your final answer?

Part 2: If, when using the seven arithmetical steps as above, your final answer was 3.5, what must your starting number have been?

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The 7puzzle Challenge

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

The 2nd & 6th rows contain the following fourteen numbers:

5     8     12     17     18     20     28     33     48     49     55     56     63     64

Which number, when 11 is added to it, becomes a square number?

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Answers

. . . can be found when clicking this.

7puzzleblog

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