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Show Your Work

Solve this one carefully!

230 – 220 x 0.5 = ?

You probably won’t believe it, but the answer is 5! How can this be true?

The answer is 120, and 5! = 5 × 4 × 3 × 2 × 1 = 120

Credit to John May for this one.


Posted in Brain Teasers

 

2 Comments on "Show Your Work"


Mark W says
November 7, 2017 @ 03:16

Of course the answer is 5( confirmed by calculator ), no surprises there!

In the absence of brackets, how did you get 120?

Thank You!


Dan says
November 7, 2017 @ 11:37

Because multiplication is always performed before subtraction (in the absence of brackets)


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