Here’s another 10-step question involving the four arithmetical operations and all the numbers from 1 to 10. Start with the number 28, then:
- divide by four
- multiply by six
- subtract two
- add five
- divide by nine
- multiply by one
- add ten
- divide by three
- add eight
- subtract seven
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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 & 3rd rows contain the following fourteen numbers:
8 13 17 25 28 36 42 45 48 55 63 64 66 80
What is the sum of the multiples of 11?
Make 186 Challenge
Can you arrive at 186 by inserting 3, 4, 6 and 9 into the gaps below?
(◯×◯+◯)×◯ = 186
Answers can be found here.
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