DAY 19:

Today’s Challenge

All of the following 2-digit numbers are divisible by 3, except one.  Which one?

36     39     45     48     53     57     66     69     72     78     84     87

[Note: If you don’t know the trick on how to work this out quickly, please get in touch.]

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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

What is the sum of the multiples of 7?

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Answers

. . . can be found when clicking this.

7puzzleblog

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