DAY 218:

Today’s Challenge

From all the odd numbers in the range 1-23 inclusive, eliminate all prime numbers and multiples of 3. Which is the only number to remain?

The 7puzzle Challenge

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

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

3    10    13    25    32    35    36    42    44    45    54    60    66    80

Which number, when 10 is added to it, becomes a square number?

Make 218 Challenge

Can you arrive at 218 by inserting 4, 5, 8 and 9 into the gaps below?

◯²+◯³+(6×◯÷◯) = 218

Answers can be found here.

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