DAY 300

Today’s Challenge

Here’s a MATHELONA challenge for you to try based on the ones found in my pocket book. Full details of the pocket book can be found by clicking MATHELONA.

You must make all four lines work out arithmetically by replacing the 16 ◯’s with digits from 0 to 9.  Remember, each digit can only be inserted a maximum of twice:

◯  +  ◯   =    13    =   ◯  +  ◯
◯  +  ◯   =     8     =   ◯  –  ◯
◯  +  ◯   =    12    =   ◯  ×  ◯
◯  +  ◯   =     2     =   ◯  ÷  ◯

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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 4th & 5th rows of the playing board contain the following fourteen numbers:

3     6     7     10     16     21     32     35     44     50     54     60     81     84

What is the sum of the factors of 70 listed above?

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Answers

. . . can be found when clicking this.

7puzzleblog

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