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

Redeem

divisible by 3 of the sequence

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Master | Next Rank: 500 Posts
Posts: 232
Joined: Fri Jun 18, 2010 7:09 am
Thanked: 1 times
Followed by:2 members

divisible by 3 of the sequence

by ruplun » Sun Jun 26, 2011 2:09 am
If S is the infinite sequence
S1=9,S2=99,S3=999,................SK=10^K -1
is every term in S divisible by the prime number p?

(1) p is greater than 2
(2) At least one term in sequence S is divisible by p
Top
Source: — Data Sufficiency |
Legendary Member
Posts: 1448
Joined: Tue May 17, 2011 9:55 am
Location: India
Thanked: 375 times
Followed by:53 members

by Frankenstein » Sun Jun 26, 2011 2:53 am
Hi,
From(1): if p= 3, every term in S divisible by p
if p = 11, some are divisible by p and some are not
Not sufficient
From(2): Consider the same set of values for p i.e. 3 and 11
Not sufficient
Both(1)&(2):
Same set
Not sufficient

Hence, E
Cheers!

Things are not what they appear to be... nor are they otherwise
Top
Post new topic Post Reply
• Page 1 of 1