The Main Challenge
If you wrote down all single-digit numbers and numbers that are factors of 80, how many different numbers would be on your list?
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 1st & 6th rows contain the following fourteen numbers:
2 5 9 12 14 15 18 20 22 33 40 49 56 72
As well as 2+12 (=14), can you find the other SEVEN pairs of numbers whose sum is also listed?
The Factors Challenge
Which of the following numbers are factors of 281?
3 5 7 9 11 13 None of them
The Mathematically Possible Challenge
Using 2, 7 and 10 once each, with + – × ÷ available, which are the only THREE numbers it is possible to make from the list below?
9 18 27 36 45 54 63 72 81 90
#9TimesTable
The Target Challenge
Can you arrive at 281 by inserting 1, 2, 3, 4 and 5 into the gaps below?
- (◯³+◯²)×(◯–◯)+◯² = 281
Answers can be found here.
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