DAY 280

Today’s Challenge

. . . is to arrive at the target number of 18 by adding together exactly FIVE numbers.  You are limited to using digits 1 to 5 but these can be used any number of times in each calculation.

One way of making 18 is 5+5+5+2+1 (or 55521 to save time), so can you list the other SIX ways it is possible to make 18 in our 5puzzle challenge?

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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 3rd & 5th rows contain the following fourteen numbers:

6     7     13     16     21     25     36     42     45     50     66     80     81     84

What is double the highest prime number on the list?

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Answers

. . . can be found when clicking this.

7puzzleblog

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