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-   -   Is this a trick (http://mymathforum.com/elementary-math/327192-trick.html)

kiwis February 7th, 2016 11:29 AM

Is this a trick
 
Quote:

Divide 40 by one and a half and add 10
The answer is 90?

How?

skeeter February 7th, 2016 11:36 AM

$40 \div \dfrac{3}{2} + 10 \ne 90$

now, $40 \div \dfrac{1}{2} + 10 = 90$

Monox D. I-Fly February 7th, 2016 06:05 PM

You mean it is translated as "divide 40 by one, then by half, and add 10"?

Country Boy February 8th, 2016 09:03 AM

That is what is suggested. Kiwis, where did you get the "90" from?

40 divided by "one and a half" is 80/3= "26 and 2/3". Then "add 10" is "36 and 2/3".

Denis February 8th, 2016 10:24 AM

Kiwis seems to post these "confusing" problems fairly often;
wonder if he's doing it on purpose...

Monox D. I-Fly February 9th, 2016 07:21 PM

Or the question wasn't in English and it's just lost in translation. Didn't I experience similar case before?


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