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

Redeem

29-31

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 484
Joined: Sun Jul 30, 2006 7:01 pm
Thanked: 2 times
Followed by:1 members

29-31

by magical cook » Tue Aug 28, 2007 10:31 am
In the decimal representation of x, where 0 < x < 1, is the tenths digit of x nonzero?
(1) 16x is an integer.
(2) 8x is an integer.
Top
Source: — Data Sufficiency |
Master | Next Rank: 500 Posts
Posts: 144
Joined: Fri Apr 13, 2007 2:25 am

by radhika1306 » Tue Aug 28, 2007 10:34 am
E
what's the OA?
Top
Master | Next Rank: 500 Posts
Posts: 144
Joined: Fri Apr 13, 2007 2:25 am

by radhika1306 » Wed Aug 29, 2007 5:54 am
Statement 1
16x so if x is 0.0001
then 16x= 0.00016
So we don't know the Tenths value
if x=0.1 then 16*x=1.60 in that case tents value is 6

simiarly with 8x

SO i think E
but i am not sure .
can someone explain if i am wrong
Top
Master | Next Rank: 500 Posts
Posts: 101
Joined: Tue Aug 07, 2007 1:45 am
Followed by:1 members

by agps » Wed Aug 29, 2007 7:35 am
I think it's B.

1) 16x is integer, so x = 1/2 or 1/4 or 1/8 or 1/16 (factors of 16, lest I forgot any), which means x=0,5 or 0,25 or 0,125 or 0,0625. since 1 of this values has the tenths digit 0 not sufficient

2) 8x is integer, so x = 1/2 or 1/4 or 1/8 (factors of 8, lest I forgot any), which means x=0,5 or 0,25 or 0,125. since none of this values has the tenths digit 0 sufficient
Top
Master | Next Rank: 500 Posts
Posts: 484
Joined: Sun Jul 30, 2006 7:01 pm
Thanked: 2 times
Followed by:1 members

by magical cook » Wed Aug 29, 2007 9:44 am
The answer is B. thanks.
Top
Post new topic Post Reply
• Page 1 of 1