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Moderator  Joined: 18 Apr 2015
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For all numbers n, n* = 32 - n [#permalink]
Expert's post 00:00

Question Stats: 74% (00:33) correct 25% (00:52) wrong based on 35 sessions
For all numbers $$n$$, $$n* = 32 - n$$.

 Quantity A Quantity B $$(n*)^*$$ $$n$$

A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
[Reveal] Spoiler: OA

_________________ GRE Forum Moderator
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Re: For all numbers n, n* = 32 - n [#permalink]
2
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Carcass wrote:
For all numbers $$n$$, $$n* = 32 - n$$.

 Quantity A Quantity B $$(n*)^*$$ $$n$$

A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.

Given $$n$$, $$n* = 32 - n$$

Column A n^*= 32 - n .

When (n^*)^* = 32 ( 32 - n ) => n .

Column B and A values are same.

C. Intern Joined: 21 Nov 2017
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Re: For all numbers n, n* = 32 - n [#permalink]
2
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n* = 32 - n
--> Quantity A = (n*)* =(32-n)* = 32 - (32-n) = n = Quantity B

Key: C Manager Joined: 22 Feb 2018
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Re: For all numbers n, n* = 32 - n [#permalink]
2
KUDOS
n* = 32-n for all numbers n.
A: (n*)* = (32-n)* = 32 - (32-n) = n
B: n
Thus, A and B are equal and the answer is C.

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Manager Joined: 27 Feb 2017
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Re: For all numbers n, n* = 32 - n [#permalink]
so '*' here means '32 -' ? I found this kinda confusing GRE Instructor Joined: 10 Apr 2015
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Re: For all numbers n, n* = 32 - n [#permalink]
1
KUDOS
Expert's post
kruttikaaggarwal wrote:
so '*' here means '32 -' ? I found this kinda confusing

This is known as a Strange Operator question (see video below)

For this question, the asterisk symbol (*) tells us to take whatever number is next to it and subtract it from 32.
That is, *n = 32 - n

So, for example, *10 = 32 - 10 = 22
And *15 = 32 - 15 = 17
And *100 = 32 - 100 = -68

------NOW ONTO THE QUESTION------------

Quantity A: (n*)*
Quantity B: n

Let's simplify (n*)*
First off, n* = 32 - n
So, (n*)* = (32 - n)*

Now let's simplify (32 - n)*
(32 - n)* = 32 - (32 - n)
= n

So, we have:
Quantity A: n
Quantity B: n

RELATED VIDEO

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Brent Hanneson – Creator of greenlighttestprep.com Sign up for our free GRE Question of the Day emails GRE Instructor Joined: 10 Apr 2015
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Kudos [?]: 1481  , given: 8

Re: For all numbers n, n* = 32 - n [#permalink]
1
KUDOS
Expert's post
A few more Strange Operator questions to practice with:
- https://greprepclub.com/forum/for-all-i ... -5221.html
- https://greprepclub.com/forum/qotd-4-if ... -2328.html
- https://greprepclub.com/forum/the-opera ... -1884.html

Cheers,
Brent
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Brent Hanneson – Creator of greenlighttestprep.com Sign up for our free GRE Question of the Day emails Re: For all numbers n, n* = 32 - n   [#permalink] 20 Jun 2018, 15:03
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