DAY 159:

Today’s Challenge

Can you make all three lines work out arithmetically by replacing the nine ◯’s below with the nine numbers 1, 2, 3, 4, 5, 6, 10, 11 and 12?

◯   +   ◯   =   ◯
◯   +   ◯   =   ◯
◯   +   ◯   =   ◯

If you enjoy this type of number puzzle, click MATHELONA which will give you full information about our pocket book challenges.

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

Which number, when 10 is added to it, becomes a multiple of 7?

Answers can be found here.

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

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