Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 06 Jul 2015, 05:40

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Which of the following expressions can be written as an

Author Message
TAGS:
VP
Joined: 08 Jun 2005
Posts: 1146
Followers: 6

Kudos [?]: 136 [0], given: 0

Which of the following expressions can be written as an [#permalink]  12 Oct 2007, 00:40
Which of the following expressions can be written as an integer ?

1. (82^1/2+82^1/2)^2

2. 82*(82^1/2)

3. ((82^1/2)*(82^1/2))/82

_________________________________________________

A. None
B. 1 only.
C. 3 only.
D. 1 and 2.
E. 1 and 3.

Thanks - OA soon.
Intern
Joined: 09 Oct 2007
Posts: 17
Followers: 0

Kudos [?]: 0 [0], given: 0

Re: Gset integer [#permalink]  12 Oct 2007, 01:04
KillerSquirrel wrote:
Which of the following expressions can be written as an integer ?

1. (82^1/2+82^1/2)^2

2. 82*(82^1/2)

3. ((82^1/2)*(82^1/2))/82

_________________________________________________

A. None
B. 1 only.
C. 3 only.
D. 1 and 2.
E. 1 and 3.

Thanks - OA soon.

IMHO, E.

1. (82^1/2 +82^1/2)^2 = (82^1/2)^2+2*82^1/2*82^1/2+(82^1/2)^2 =
82+2*82+82.
2. 82*(82^1/2) = 82^1*82^1/2 = 82^(1+1/2)=82^1.5
3. ((82^1/2)*(82^1/2))/82 = 82^(1/2+1/2)/82 = 1
SVP
Joined: 01 May 2006
Posts: 1798
Followers: 8

Kudos [?]: 102 [0], given: 0

(E) as well

1. (82^1/2+82^1/2)^2
= (2 * (82^1/2))^2
= 4 * 82

2. 82*(82^1/2) >>>> Nothing to do here

3. ((82^1/2)*(82^1/2))/82
= 82/82
= 1
VP
Joined: 08 Jun 2005
Posts: 1146
Followers: 6

Kudos [?]: 136 [0], given: 0

The OA is indeed (E)

Similar topics Replies Last post
Similar
Topics:
25 Which expression is the greatest (m07q16) 15 12 Feb 2009, 22:28
Which of the following expressions is defined for all 8 06 Sep 2008, 09:31
I am stuck on the following Algebra expression: 4 01 Sep 2008, 11:32
Which of the following can be a perimeter of a triangle 1 07 Nov 2007, 07:44
If each of the following fractions were written as a 2 24 Mar 2007, 14:49
Display posts from previous: Sort by