BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

terminating decimal

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Legendary Member
Posts: 1309
Joined: Wed Mar 17, 2010 11:41 pm
Thanked: 33 times
Followed by:5 members

terminating decimal

by pradeepkaushal9518 » Tue Jun 22, 2010 5:50 am
any decimal that has only a finite numbers of non zero digits is a terminating decimal.for example 24,0.82 and 5.096 are three terminating decimals. if r and s are positive integers and the ratio r/s is expressed as a decimal, is r/s a terminating decimal?
1.90<r<100
2.s=4
Top
Source: — Data Sufficiency |
User avatar
GMAT Instructor
Posts: 147
Joined: Tue Aug 25, 2009 7:57 pm
Location: New York City
Thanked: 76 times
Followed by:17 members
GMAT Score:770

by Rich@VeritasPrep » Tue Jun 22, 2010 6:06 am
any decimal that has only a finite numbers of non zero digits is a terminating decimal.for example 24,0.82 and 5.096 are three terminating decimals. if r and s are positive integers and the ratio r/s is expressed as a decimal, is r/s a terminating decimal?
1.90<r<100
2.s=4

St (1):

r/s could be 91/2, in which case it would be a terminating decimal (i.e. 45.5)

r/s could be 91/3, in which case it would NOT be a terminating decimal (i.e. 30.333333...)

INSUFFICIENT

St (2):

It doesn't matter what r is, because when you divide an integer by 4, the result is either a whole number or a number whose decimal part is 0.25, 0.50, or 0.75. In all of these cases, you have a terminating decimal.

SUFFICIENT
Rich Zwelling
GMAT Instructor, Veritas Prep
Top
Post new topic Post Reply
• Page 1 of 1