Brain Teasers
Balance Beams 1
Two beams (rows of numbers) are given below. The first beam has a sum of 17; the second beam has a sum of 22. Your challenge is to balance the beams, so that the two rows have the same sum. You are only allowed to move two numbers; all of the numbers must be used in the answer.
1 3 5 8
2 4 7 9
1 3 5 8
2 4 7 9
Hint
The sum of all the numbers is odd.One of the numbers must be moved in a tricky way to make a smaller number.
Answer
Move the 9 to the top row, but as you do, turn it upside down, making it into a 6.Move the 5 to the bottom row. Both beams now have a sum of 18.
1 3 6 8
2 4 7 5
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Comments
I really enjoyed this one, but isn't it kind of a "Trick" since it requires the "9" to be turned upside-down?
Turning the 6 upside down is a bit silly in my opinion.
Moving the 3 from row 1 to 'somewhere' and moving the 4 from row 2 to row 1 is at least as good.
Moving the 3 from row 1 to 'somewhere' and moving the 4 from row 2 to row 1 is at least as good.
That doesn't work because "all of the numbers must be used in the answer".
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