DAY 158:

Today’s Challenge

Here’s a 10-step number trail involving the four arithmetical operations and the numbers 1, 2 and 3.  Starting with 10, carry out these 10 steps. What is your final answer?

  • add 2
  • ×1
  • ÷3
  • 2
  • multiply by 3
  • +1
  • subtract 3
  • divide by 1
  • ×2
  • take away two

Also try three further challenges using starting numbers of 7, 4 and 1 respectively.  What are those answers?

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 1st & 5th rows contain the following fourteen numbers:

2    6    7    9    14    15    16    21    22    40    50    72    81    84

Find two separate pairs of numbers that each have a difference of 44.

Answers can be found here.

Click this link for details of online math tuition with me, Paul Godding.

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