Dare these number properties DS

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

Redeem

This topic has expert replies

Post new topic Post Reply

Previous Topic Next Topic

Night reader: Legendary Member; Posts: 1337; Joined: Sat Dec 27, 2008 6:29 pm; Thanked: 127 times; Followed by:10 members

Dare these number properties DS

by Night reader » Tue Nov 30, 2010 10:23 pm

When the positive integer n is divided by 15, the remainder is 4. What is the value of n?

(1) When n is divided by 10, the remainder is 9
(2) n < 50

My knowledge frontiers came to evolve the GMATPill's methods - the credited study means to boost the Verbal competence. I really like their videos, especially for RC, CR and SC. You do check their study methods at https://www.gmatpill.com

Quote

Source: Beat The GMAT — Data Sufficiency | Tue Nov 30, 2010 10:23 pm

beat_gmat_09: Master | Next Rank: 500 Posts; Posts: 437; Joined: Sat Nov 22, 2008 5:06 am; Location: India; Thanked: 50 times; Followed by:1 members; GMAT Score:580

by beat_gmat_09 » Tue Nov 30, 2010 10:32 pm

pick 4, 19,34,49
as these satisfy 15x+4
1) n divided by 10, remainder 9, n can be 19,49, ......
2) n<50 alone gives 4,19,34,49. Not sufficient.
Both - eliminates 4,34. Remains 19,49. Both not sufficient.
E.

Hope is the dream of a man awake

Quote

shovan85: Community Manager; Posts: 991; Joined: Thu Sep 23, 2010 6:19 am; Location: Bangalore, India; Thanked: 146 times; Followed by:24 members

by shovan85 » Tue Nov 30, 2010 10:49 pm

n = 15k + 4 (4,19,34,....)

(1) n = 10k' + 9 (9,19,29,39,49,....)
n can be 19, 49,....
Not Sufficient.

(2) n< 50
n can be 4,19,34,49,..
Not sufficient.

Combine both n can be 19,49
Not sufficient.

IMO E

If the problem is Easy Respect it, if the problem is tough Attack it