The Main Challenge
Using 1, 5 and 10 once each, with + – × ÷ available, list the EIGHT different even-numbered target numbers that are possible to make from 2-60.
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 6th & 7th rows contain the following fourteen numbers:
4 5 11 12 18 20 24 27 30 33 49 56 70 77
What is the sum of the multiples of 5?
The Factors Challenge
Which of the following numbers are factors of 303?
3 5 7 9 11 13
The Mathematically Possible Challenge
Using 3, 8 and 10 once each, with + – × ÷ available, which is the ONLY number it is possible to make from the list below?
10 20 30 40 50 60 70 80 90 100
#10TimesTable
The Target Challenge
Can you arrive at 303 by inserting 1, 2, 3, 4 and 5 into the gaps below?
- (◯⁴–◯²–◯)÷(◯×◯) = 303
Answers can be found here.
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