T he Main Challenge
In the following multiplication magic square, the numbers in each of the rows, columns and diagonals multiply together to give the same result; 1000.
Two of the numbers have been given to you:
x x x
x 10 x
x 1 x
Can you complete the rest of this magic square without repeating any numbers?
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 3rd & 7th rows contain the following fourteen numbers:
4 11 13 24 25 27 30 36 42 45 66 70 77 80
Which three different numbers have a sum of 77?
The Factors Challenge
Which of the following numbers, if any, are factors of 257?
3 5 7 9 11 13 None of them
The Mathematically Possible Challenge
Using 5, 8 and 11 once each, with + – × ÷ available, which are the only TWO 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 257 by inserting 2, 4, 5, 8 and 9 into the gaps below?
- ◯²×◯+◯×(7+◯+◯) = 257
Answers can be found here.
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