The Main Challenge
By using the formula (a×b)+c, where a b and c are three unique digits from 1-9, one way of arriving at 24 is (5×3)+9, but can you find the only other way of making 24 when using the above rule.
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 2nd & 5th rows contain the following fourteen numbers:
6 7 8 16 17 21 28 48 50 55 63 64 81 84
Which three pairs of numbers all have a difference of 47?
The Factors Challenge
Which is the ONLY one of the following that is not a factor of 312?
2 3 4 6 8 9 12 13
The Mathematically Possible Challenge
Using 4, 7 and 11 once each, with + – × ÷ available, which are the only THREE numbers it is possible to make from the list below?
8 16 24 32 40 48 56 64 72 80
#8TimesTable
The Target Challenge
Can you arrive at 312 by inserting 2, 3, 4, 6 and 8 into the gaps below?
- (◯+◯+◯)×◯×◯ = 312
Answers can be found here.
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