DAY 157:

Today’s Challenge

Using each of the decimal numbers 0.1, 0.2, 0.3 and 0.4 once only, and with the four arithmetical operations + – × and ÷ available, show how you can arrive at the target answer of 7.

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

What is the sum of the square numbers?

Answers can be found here.

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

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