The Main Challenge
If you eliminated multiples of 3, 5 and 7 from this list:
12 14 18 21 25 28 30 33 35 36 40 42 44 48 54 55 56 60
which is the ONLY number that would remain?
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 & 6th columns contain the following fourteen numbers:
2 7 10 16 30 33 36 40 45 48 49 54 64 70
How many of the numbers listed are NOT multiples of 6 or 7?
The Factors Challenge
Which of the following numbers are factors of 332?
4 6 8 10 12 14 16 18 None of them
The Mathematically Possible Challenge
Using 5, 6 and 12 once each, with + – × ÷ available, which is the ONLY number it is possible to make from the list below?
100 101 102 103 104 105 106 107 108 109
#Numbers100to109
The Target Challenge
Can you arrive at 332 by inserting 2, 3, 4, 5 and 6 into the gaps below?
- (◯×◯)²+(double◯)³+(◯–◯)⁴ = 332
Answers can be found here.
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