T he Main Challenge
You have been given the task of manually numbering a 100-page document from 1 to 100.
Which digit will appear least, and how many times?
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 & 6th rows contain the following fourteen numbers:
5 8 12 17 18 20 28 33 48 49 55 56 63 64
List five pairs of numbers that have a difference of 15.
The Factors Challenge
Which of the following numbers are factors of 254?
2 4 6 8 10 12 14
[ Today’s Hint: A number is a multiple of 4 if it is still even when halved ]
The Mathematically Possible Challenge
Using 5, 8 and 11 once each, with + – × ÷ available, which are the only THREE numbers it is possible to make from the list below?
8 16 24 32 40 48 56 64 72 80
#8TimesTable
The Target Challenge
Can you arrive at 254 by inserting 1, 3, 5, 7 and 10 into the gaps below?
- (◯+◯)×◯²–◯×◯ = 254
Answers can be found here.
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