DAY 318:

Today’s Challenge

. . . is a number puzzle associated with my board game, Mathematically Possible, an excellent resource involving mental arithmetic and strategy. Click the above link for details of our board game and online programme.

Using the numbers 2, 5 and 10 once each, with + – × ÷ available, which 11 target numbers from 1-30 are mathematically possible to achieve?

The 7puzzle Challenge

The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to 84.

The 3rd & 4th columns of the playing board contain the following fourteen numbers:

3    4    6    12    15    17    20    35    42    63    72    77    80    81

What is the sum of the square numbers?

Make 318 Challenge

Can you arrive at 318 by inserting 1, 2, 4, 9 and 10 into the gaps below?

(◯+◯)²+(◯+◯)²+◯ = 318

Answers can be found here.

Click Paul Godding for details of online math tuition. Wherever you are in the world, please get in touch.

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