82 - 41 = 43?
by, 26th February 2011 at 10:12 AM (413 Views)
Another classic puzzle of mine. This has frustrated many people.
Using 30 toothpicks, lay out the equation "82 - 41 = 43" as it would appear on a seven-segment display.
Now, notice that this equation is almost correct - the "2" and "3" are switched around. By moving just two toothpicks, you could switch the two numbers around to create "83 - 41 = 42", which is correct.
But you don't have two toothpicks to move. Your task is to make the equation correct by moving only one toothpick.
Note: the trivial solution of taking any random toothpick and placing it on top of the equals sign is not acceptable. That would make it an inequality.
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