The Main Challenge
Of all the whole numbers from 1-100, find the longest run of consecutive numbers that are NOT prime numbers. What are the lowest and highest numbers in that run?
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
What is the sum of the square numbers?
The Factors Challenge
Which of the following numbers are factors of 271?
3 5 7 9 11 13 None of them
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?
1 4 9 16 25 36 49 64 81 100
#SquareNumbers
The Target Challenge
Can you arrive at 271 by inserting 3, 4, 4, 5 and 6 into the gaps below?
- ((◯+◯)²+◯)×◯–◯ = 271
Answers can be found here.
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