The Main Challenge
Using the numbers 4, 4 and 8 once each, with + – × ÷ available, what is the lowest whole number it is not 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 2nd & 3rd columns contain the following fourteen numbers:
2 4 10 12 15 16 17 33 35 45 48 70 80 81
How many pairs of numbers have a sum of 50?
The Factors Challenge
Which of the numbers below are factors of 349?
3 5 7 9 11 13 15 17 19 None of them
The Mathematically Possible Challenge
Using 1, 3 and 9 once each, with + – × ÷ available, which is the ONLY number 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 349 by inserting 6, 7, 8, 9 and 10 into the gaps below?
- (◯²+◯²)׳√◯–(◯+◯) = 349
Answers can be found here.
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