DAY 228

Today’s Challenge

You have been given a starting number as well as an end answer. There are seven arithmetical steps in all, but the middle step is missing!

Start with the number 7, then:

2      ×4      +1      ?      ×5      ÷3      +2      =      7

The missing step involves a single-digit whole number.  Work out this missing step so the final answer will also be 7.

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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 up to 84.

The 1st & 7th rows of the playing board contain the following fourteen numbers:

2     4     9     11     14     15     22     24     27     30     40     70     72     77

Which four different numbers above have a sum of 100?

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Answers

. . . can be found when clicking this.

7puzzleblog

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