## 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

6 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)

Kenton says

February 23, 2018 @ 12:30

It’s not 5, it’s 120, order of operations.

Dan says

February 24, 2018 @ 22:42

Right, it’s 5!

Robbie says

March 9, 2019 @ 05:30

Well, if the calculation was worked out in the right order the correct answer would be 120, unless brackets are put in – multiplication comes before subtraction.

gyan says

August 1, 2019 @ 01:16

In the world of factorials 1=0! .. so there!

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