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

Redeem

decimal number

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Data Sufficiency |
User avatar
Master | Next Rank: 500 Posts
Posts: 385
Joined: Sun May 24, 2009 3:55 pm
Thanked: 11 times
GMAT Score:740

by Domnu » Sat Jun 06, 2009 2:12 pm
We can have 16x to be an integer only for x = 1/2, 1/4, 1/8, 1/16, and of these, the first three have non-zero tenths digits while the latter has a tenths digit of 0, so (1) alone isn't sufficient.

However, for 8x to be an integer, x = 1/2, 1/4, 1/8, and all of these have non-zero tenths digits.

So, (2) alone is sufficient.
Have you wondered how you could have found such a treasure? -T
Top
Legendary Member
Posts: 594
Joined: Thu Aug 14, 2008 11:51 pm
Thanked: 12 times

by nervesofsteel » Sat Jun 06, 2009 10:55 pm
Domnu wrote:We can have 16x to be an integer only for x = 1/2, 1/4, 1/8, 1/16, and of these, the first three have non-zero tenths digits while the latter has a tenths digit of 0, so (1) alone isn't sufficient.

However, for 8x to be an integer, x = 1/2, 1/4, 1/8, and all of these have non-zero tenths digits.

So, (2) alone is sufficient.
Thanks .. It helps to understand the question
Top
Post new topic Post Reply
• Page 1 of 1