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

Redeem

Need the explaination for this DS Question

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Senior | Next Rank: 100 Posts
Posts: 74
Joined: Tue Sep 25, 2007 7:58 am
Thanked: 4 times

Need the explaination for this DS Question

by joshi.komal » Fri Jan 18, 2008 3:06 pm
Quant review: Q 82.

If m and n are consecutive positive integers, is m greater than?

1. m-1 and n+1 are consecutive positive integers
2. m is an even number.

I am able to rephrase the Question as
Is m-n = 1 ?
Or Is m= n+1?

But I am unable to solve the the first statement.

Please Help

Thanks
Komal
Top
Source: — Data Sufficiency |
User avatar
Master | Next Rank: 500 Posts
Posts: 423
Joined: Thu Dec 27, 2007 1:29 am
Location: Hyderabad, India
Thanked: 36 times
Followed by:2 members
GMAT Score:770

by simplyjat » Fri Jan 18, 2008 8:33 pm
m,n are consecutive numbers => m = n-1 or m = n+1
m-1, n+1 are consecutive number => (m-1) = (n+1)-1 or (m-1) = (n+1)+1
simplyjat
Top
Senior | Next Rank: 100 Posts
Posts: 74
Joined: Tue Sep 25, 2007 7:58 am
Thanked: 4 times

by joshi.komal » Sat Jan 19, 2008 2:45 am
simplyjat wrote:m,n are consecutive numbers => m = n-1 or m = n+1
m-1, n+1 are consecutive number => (m-1) = (n+1)-1 or (m-1) = (n+1)+1

Oh I see:

if m > n then m-1 = (n+1) - 1
= n
which proves that m= n+1
This is the proof that the question is asking for.

Thanks
Komal
Top
Senior | Next Rank: 100 Posts
Posts: 74
Joined: Tue Sep 25, 2007 7:58 am
Thanked: 4 times

by joshi.komal » Sat Jan 19, 2008 2:48 am
simplyjat wrote:m,n are consecutive numbers => m = n-1 or m = n+1
m-1, n+1 are consecutive number => (m-1) = (n+1)-1 or (m-1) = (n+1)+1
Thanks simplyjat for this explaination.
Top
Post new topic Post Reply
• Page 1 of 1