A traditional clock was numbered √1, √4, √9 . . . √144 around its circumference. Every digit is represented on the clock, except one:
- What is this missing digit?
- Which is the first square number to contain this missing digit?
- If this clock was developed into a 24-hour clock, would it now contain the missing digit?
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 5th & 6th rows of the playing board contain the following fourteen numbers:
5 6 7 12 16 18 20 21 33 49 50 56 81 84
When finding the factors of 40 listed above, what is their sum?
Make 118 Challenge
Can you arrive at 118 by inserting 1, 2, 4 and 5 into the gaps on each line?
- ◯³+◯–◯×◯ = 118
- (◯³–◯×◯)×◯ = 118
Answers can be found here.
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