DAY 81:

Today’s Challenge

Carry out the following 15-step number trail – with no calculator!

Start with 20, then:

+1  ÷3  ×5  –7  +2  ÷6  +4  –1  ×3  ÷4  +4  –5  ×1  +3  ×6  =  ?

What is your final answer?

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 2nd & 3rd rows contain the following fourteen numbers:

8   13   17   25   28   36   42   45   48   55   63   64   66   80

Which three different numbers have a sum of 100?

Make 81 Challenge

Can you arrive at 81 by inserting 2, 3, 6 and 9 into the gaps on each line?

  •  ◯×◯×◯÷ = 81
  •  ◯²××◯÷◯ = 81
  •  ◯²+×(+) = 81

Answers can be found here.

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