DAY 59:

Today’s Challenge

Your starting number is 18 and your task is to arrive at the same final answer.  There are ten arithmetical steps from beginning to end, each one involving a whole number, but the 9th (and penultimate) step is missing!  What must it be?

÷2   +3   –8   ×6   +4   –3   ÷5   ×2   ?   ×2   =   18

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 4th & 6th rows contain the following fourteen numbers:

3   5   10   12   18   20   32   33   35   44   49   54   56   60

What is the difference between the lowest and highest multiples of 4?

Make 59 Challenge

Can you arrive at 59 by inserting 4, 5, 6 and 10 into the gaps on each line?

  •  ◯×+ = 59
  •  ◯²+◯×◯+ = 59
  •  (◯+◯)×◯– = 59

Answers can be found here.

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