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# If 30 is divided by half and 10 is added to the result, then what is f

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Director
Joined: 23 Feb 2015
Posts: 758
GMAT 1: 720 Q49 V40
If 30 is divided by half and 10 is added to the result, then what is f  [#permalink]

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25 Feb 2019, 13:39
If 30 is divided by half and 10 is added to the result, then what is final result?
A) 70
B) 25

Some people say A and some people say B. What is the accurate answer to the question?
Thanks__
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Director
Joined: 18 Jul 2018
Posts: 754
Location: India
Concentration: Finance, Marketing
WE: Engineering (Energy and Utilities)
Re: If 30 is divided by half and 10 is added to the result, then what is f  [#permalink]

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26 Feb 2019, 09:10
1
30 is divided BY half, i.e, $$\frac{30}{(1/2)}$$ = 60. adding 10 to this gives 70. A is the answer.
If the question were divided TO half, then 30 is divided by 2, resulting in 15, then B would have been the answer.
Hope this helps.
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Manhattan Prep Instructor
Joined: 04 Dec 2015
Posts: 709
GMAT 1: 790 Q51 V49
GRE 1: Q170 V170
Re: If 30 is divided by half and 10 is added to the result, then what is f  [#permalink]

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28 Feb 2019, 17:09
If 30 is divided by half and 10 is added to the result, then what is final result?
A) 70
B) 25

Some people say A and some people say B. What is the accurate answer to the question?
Thanks__

The ambiguity is because of the phrasing 'divided by half'. The GMAT will never use phrasing like this, because it's not completely clear (as your question demonstrates)!

If a problem says 'divided by 1/2' or 'divided by one half', you should do what Afc0892 suggested and divide the number by the fraction 1/2.

If a problem says 'divided in half', you should divide the number by 2.

But 'divided by half' isn't really correct grammar, and it's not something you'd see on the GMAT. In general, the GMAT rarely or never will attempt to trick you with ambiguous language - it actually tries to be extremely clear. A problem that wasn't clear would quickly be weeded out in the experimental stages, because a lot of high-scorers would miss it by simply having a different (valid) interpretation of it. The GMAT also isn't really trying to play dirty tricks on you; it wants to give you problems that can be solved by reasoning through them, not just by knowing a single language trick.

That said, there are a couple of pieces of wording that people very often misinterpret (even though they do have one clear correct interpretation) - here are a few of those: https://www.manhattanprep.com/gre/blog/ ... cks-traps/ (this is a GRE article, but you'll see very similar things on the GMAT!)
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Intern
Joined: 01 Oct 2017
Posts: 8
Concentration: Marketing, Technology
GMAT 1: 700 Q44 V41
GPA: 4
Re: If 30 is divided by half and 10 is added to the result, then what is f  [#permalink]

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28 Feb 2019, 23:02
30 Divided by Half = 30/½ = (30/1) * 2 = 60

60+10 = 70

If someone answers 25, it's because of confusing 'By half' with 'To half'

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Re: If 30 is divided by half and 10 is added to the result, then what is f   [#permalink] 28 Feb 2019, 23:02
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