DAY 263

Today’s Challenge

One of our popular MATHELONA challenges awaits you, so can you complete this by making all four lines work out arithmetically?  Replace the 16 ◯’s with digits from 0 to 9, but each digit can only be inserted a maximum of twice.

◯  +  ◯   =    8    =   ◯  +  ◯
◯  +  ◯   =    8    =   ◯  –  ◯
◯  +  ◯   =    8    =   ◯  ×  ◯
◯  +  ◯   =    7    =   ◯  ÷  ◯

Further details of our pocket book of challenges can be found by clicking MATHELONA.

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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 1st & 5th rows contain the following fourteen numbers:

2     6     7     9     14     15     16     21     22     40     50     72     81     84

Which three different numbers listed have a sum of 100?

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Answers

. . . can be found when clicking this.

7puzzleblog

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