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

Redeem

7.5 $ # 9 -----> What digit does $ represent

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Legendary Member
Posts: 941
Joined: Sun Dec 27, 2009 12:28 am
Thanked: 20 times
Followed by:1 members

7.5 $ # 9 -----> What digit does $ represent

by bhumika.k.shah » Thu Apr 01, 2010 11:56 am
7.5 $ # 9
What digit does $ represent if each of $ and # are single digits in the above decimal?

If the decimal is rounded to the nearest hundredth, the result is 7.55
If the decimal is rounded to the nearest tenth, the result is 7.5

I got a l'l stuck on the second statement.

I also dint understand what they meant by this sentence in their OE------> [spoiler]Notice that according to our rounding rules, this statement implies that the digit in the hundredths spot (the digit represented by the $ ) in the original decimal, was less than 5 [/spoiler]

Can someone help me find quicker yet detailed approaches for this Q + difficulty level of this Q ?

thanks
Top
Source: — Data Sufficiency |
User avatar
Legendary Member
Posts: 1275
Joined: Thu Sep 21, 2006 11:13 pm
Location: Arabian Sea
Thanked: 125 times
Followed by:2 members

by ajith » Thu Apr 01, 2010 12:21 pm
bhumika.k.shah wrote:7.5 $ # 9
What digit does $ represent if each of $ and # are single digits in the above decimal?

If the decimal is rounded to the nearest hundredth, the result is 7.55
If the decimal is rounded to the nearest tenth, the result is 7.5

I got a l'l stuck on the second statement.

I also dint understand what they meant by this sentence in their OE------> [spoiler]Notice that according to our rounding rules, this statement implies that the digit in the hundredths spot (the digit represented by the $ ) in the original decimal, was less than 5 [/spoiler]

Can someone help me find quicker yet detailed approaches for this Q + difficulty level of this Q ?

thanks
1. If the decimal was 7.5479 it would have been rounded to 7.55 ; If the decimal was 7.5529 it would have been rounded to 7.55 => $ can be 5 or 4
Insufficient

2. => $ is less than 5 (otherwise it would have rounded to 7.6) - insufficient $ can be 0,1,2,3 or 4

Combining,
$=4

So C
Always borrow money from a pessimist, he doesn't expect to be paid back.
Top
Legendary Member
Posts: 2326
Joined: Mon Jul 28, 2008 3:54 am
Thanked: 173 times
Followed by:2 members
GMAT Score:710

by gmatmachoman » Thu Apr 01, 2010 8:23 pm
@Ajith,

Still we can't definitely figure out the digits ...rite??? I mean we can't give precise numbers.
$---(1-4)
#(5-9)
So E
Top
User avatar
Legendary Member
Posts: 1275
Joined: Thu Sep 21, 2006 11:13 pm
Location: Arabian Sea
Thanked: 125 times
Followed by:2 members

by ajith » Thu Apr 01, 2010 8:28 pm
gmatmachoman wrote:@Ajith,

Still we can't definitely figure out the digits ...rite??? I mean we can't give precise numbers.
$---(1-4)
#(5-9)
So E
We can actually

Both the statements talk about only $

First says it is either 4 or 5
second says it is less than 5

so we can conclude that $ is 4
Always borrow money from a pessimist, he doesn't expect to be paid back.
Top
Legendary Member
Posts: 2326
Joined: Mon Jul 28, 2008 3:54 am
Thanked: 173 times
Followed by:2 members
GMAT Score:710

by gmatmachoman » Thu Apr 01, 2010 8:45 pm
ajith wrote:
gmatmachoman wrote:@Ajith,

Still we can't definitely figure out the digits ...rite??? I mean we can't give precise numbers.
$---(1-4)
#(5-9)
So E
We can actually

Both the statements talk about only $

First says it is either 4 or 5
second says it is less than 5

so we can conclude that $ is 4
Got that Man,!!Thx
Top
Post new topic Post Reply
• Page 1 of 1