The Main Challenge
This 10-step number trail, involving the four arithmetical operations, may leave you in sixes and sevens!
Start with the number 6, then:
- add 7
- –6
- multiply by 6
- +7
- divide by 7
- subtract 6
- +6
- ÷7
- add 6
- –7
What is your final answer?
The 7puzzle Challenge
The playing board of the 7puzzle game is a 7-by-7 grid of 49 different numbers, ranging from 2 up to 84.
The 2nd & 7th rows contain the following fourteen numbers:
4 8 11 17 24 27 28 30 48 55 63 64 70 77
List the four pairs of numbers that have a difference of 13.
The Factors Challenge
Which FOUR from the following list are factors of 272?
2 4 6 8 10 12 14 16 18
The Mathematically Possible Challenge
Using 3, 7 and 9 once each, with + – × ÷ available, which are the only THREE numbers it is possible to make from the list below?
2 3 5 7 11 13 17 19 23 29
#PrimeNumbers
The Target Challenge
Can you arrive at 272 by inserting 4, 6, 6, 8 and 10 into the gaps below?
- (◯+◯–◯÷◯)×◯² = 272
Answers can be found here.
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