DAY 31:

Today’s Challenge

. . . is to arrive at the target number of 20 by adding together 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 20 is 4+4+4+4+4, but you can write your answer as 44444 to save time. Can you list the FIVE other ways to make 20?

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 & 7th rows of the playing board contain the following fourteen numbers:

4   6   7   11   16   21   24   27   30   50   70   77   81   84

What is the sum of the multiples of 7?

Make 31 Challenge

Can you arrive at 31 by inserting 1, 5, 6 and 6 into the gaps on each line?

  •  ◯×× = 31
  •  ◯²÷◯+²÷◯ = 31
  •  (÷◯+◯)×◯ = 31

Answers can be found here.

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