The Main Challenge
Try this 10-step number trail involving the four arithmetical operations and all the numbers from 1 to 10.
Start off with the number 27, then:
- divide by 3
- subtract 1
- multiply by 6
- add 2
- ÷10
- +8
- –9
- ×4
- add 5
- ÷7
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
How many multiples of 5 are listed?
The Factors Challenge
Which TWO of the following numbers are not factors of 315?
3 5 7 9 11 13 15
The Mathematically Possible Challenge
Using 4, 7 and 11 once each, with + – × ÷ available, which FOUR numbers is it possible to make from the list below?
1 4 9 16 25 36 49 64 81 100
#SquareNumbers
The Target Challenge
Can you arrive at 315 by inserting 1, 3, 5, 7 and 9 into the gaps below?
- (◯+◯)²×double◯+◯×◯ = 315
Answers can be found here.
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