DAY 13:

Today’s Challenge

Starting from 2, list the first seven even numbers that are NOT multiples of 3, 5 or 7. What is the 7th number in your list?

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 5th & 6th rows of the playing board contain the following fourteen numbers:

5   6   7   12   16   18   20   21   33   49   50   56   81   84

What is the sum of the multiples of 8?

Make 13 Challenge

Can you arrive at 13 by inserting 1, 2, 3 and 4 into the gaps on each line?

  •  ◯×◯+◯–◯ = 13
  •  ◯×(◯+◯)+ = 13
  •  (²+²+◯)÷◯ = 13

Answers can be found here.

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