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

Redeem

Number System -Value of x

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: 434
Joined: Mon Jun 11, 2007 9:48 pm
Location: Bangalore
Thanked: 6 times
GMAT Score:600

by viju9162 » Thu Sep 17, 2009 2:50 am
Is the answer "A" ?

From (1) : n is a multiple of 2 ...and the set will look like this:

15 * 2 / 6 = 0 (Reminder)
15 * 4 / 6 = 0 (Reminder)
15 * 6 / 6 = 0 (Reminder)
15 * 8 / 6 = 0 (Reminder)
15 * 10 / 6 = 0 (Reminder)

From (2): n is a multiple of 3 ..and the set will look like this:

15 * 3 / 6 = 1 ( reminder)
15 * 6/6 = 0 ( reminder)
15 * 12/6 = 0 ( reminder)

We get different reminders from statement (2) ...
"Native of" is used for a individual while "Native to" is used for a large group
Top
Senior | Next Rank: 100 Posts
Posts: 52
Joined: Tue Apr 14, 2009 1:23 am

by Gmat09_5ALL » Thu Sep 17, 2009 5:10 am
Thanks viju9162, OA is A
is there any other way except from plugging value to tackle such question ?
Top
User avatar
Master | Next Rank: 500 Posts
Posts: 434
Joined: Mon Jun 11, 2007 9:48 pm
Location: Bangalore
Thanked: 6 times
GMAT Score:600

by viju9162 » Thu Sep 17, 2009 5:28 am
Hi Gmat09_5ALL,

Thank you. I am not sure solving without plugging values. Maybe, experts can help us here.

Regards,
Viju
"Native of" is used for a individual while "Native to" is used for a large group
Top
Master | Next Rank: 500 Posts
Posts: 141
Joined: Sat Feb 28, 2009 8:19 am
Thanked: 1 times

by getso » Tue Dec 15, 2009 5:12 am
We can take this approach.

15n can be expressed as 3*5*n.

Question is Is 3*5*n/2*3=5*n/2 ( 3 gets cancelled)
Thus if number is divisible by 2 then it is divisible by 6 here.


A says 3*5*n is completely divisible by 2.
Thus n will be 2 or multiples of 2.
From this it is clear that for 3*5*n/2 is divisible by 2.

Thus Statement 1 is sufficient.

Statement 2 says that number is divisible by 3. It does not address whether number is divisible by 2 or not.
Hence not sufficient.

So A is the correct answer
Top
Post new topic Post Reply
• Page 1 of 1