DAY 205:

Today’s Challenge

Pair the ten numbers below so that the difference between the two numbers in each pair is exactly divisible by 7:

6      17      28      37      45      58      64      78      83      98

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 1st & 3rd rows of the playing board contain the following fourteen numbers:

2    9    13    14    15    22    25    36    40    42    45    66    72    80

What is the sum of the factors of 80 listed above?

Make 205 Challenge

Can you arrive at 205 by inserting 2, 10, 12 and 17 into the gaps below?

(◯+◯÷◯)×◯ = 205

Answers can be found here.

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