It is currently 21 Mar 2018, 11:53

### 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 fractions has a decimal equivalent

Author Message
Senior Manager
Joined: 02 Dec 2007
Posts: 432
Which of the following fractions has a decimal equivalent [#permalink]

### Show Tags

20 Sep 2008, 07:51
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Which of the following fractions has a decimal equivalent that is a terminating decimal?

A.10/189
B.15/196
C.16/225
D.25/144
E.39/128

Can anyone suggest an easy approach ?
Director
Joined: 14 Aug 2007
Posts: 704

### Show Tags

20 Sep 2008, 08:06
Nihit wrote:
Which of the following fractions has a decimal equivalent that is a terminating decimal?

A.10/189
B.15/196
C.16/225
D.25/144
E.39/128

Can anyone suggest an easy approach ?

E.
128 has all powers of 2.
VP
Joined: 30 Jun 2008
Posts: 1019

### Show Tags

20 Sep 2008, 08:26
alpha_plus_gamma wrote:
Nihit wrote:
Which of the following fractions has a decimal equivalent that is a terminating decimal?

A.10/189
B.15/196
C.16/225
D.25/144
E.39/128

Can anyone suggest an easy approach ?

E.
128 has all powers of 2.

Can you elaborate a bit more please ?
_________________

"You have to find it. No one else can find it for you." - Bjorn Borg

VP
Joined: 05 Jul 2008
Posts: 1373

### Show Tags

20 Sep 2008, 18:00
1
KUDOS
Nihit wrote:
Which of the following fractions has a decimal equivalent that is a terminating decimal?

A.10/189
B.15/196
C.16/225
D.25/144
E.39/128

Can anyone suggest an easy approach ?

If we can express the denominator in the form of 2^x X 5^y the decimal will terminate.

Only 128 can be expressed as 2 ^ 7 X 5 ^ 0

HTH
VP
Joined: 17 Jun 2008
Posts: 1325

### Show Tags

20 Sep 2008, 22:48
icandy wrote:
Nihit wrote:
Which of the following fractions has a decimal equivalent that is a terminating decimal?

A.10/189
B.15/196
C.16/225
D.25/144
E.39/128

Can anyone suggest an easy approach ?

If we can express the denominator in the form of 2^x X 5^y the decimal will terminate.

Only 128 can be expressed as 2 ^ 7 X 5 ^ 0

HTH

Great !!!ut what if the dinominator where some other number other than these and still terminating .
_________________

cheers
Its Now Or Never

SVP
Joined: 17 Jun 2008
Posts: 1504

### Show Tags

22 Sep 2008, 11:30
icandy wrote:
Nihit wrote:
Which of the following fractions has a decimal equivalent that is a terminating decimal?

A.10/189
B.15/196
C.16/225
D.25/144
E.39/128

Can anyone suggest an easy approach ?

If we can express the denominator in the form of 2^x X 5^y the decimal will terminate.

Only 128 can be expressed as 2 ^ 7 X 5 ^ 0

HTH

icandy, nice explanation. What is the logic behind this? Is it that only prime numbers 2 and 5 can divide 1 with terminating decimal?
Re: Terminating Decimal   [#permalink] 22 Sep 2008, 11:30
Display posts from previous: Sort by

# Which of the following fractions has a decimal equivalent

Moderator: chetan2u

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.