GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 19 Nov 2018, 08:05

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

## Events & Promotions

###### Events & Promotions in November
PrevNext
SuMoTuWeThFrSa
28293031123
45678910
11121314151617
18192021222324
2526272829301
Open Detailed Calendar
• ### How to QUICKLY Solve GMAT Questions - GMAT Club Chat

November 20, 2018

November 20, 2018

09:00 AM PST

10:00 AM PST

The reward for signing up with the registration form and attending the chat is: 6 free examPAL quizzes to practice your new skills after the chat.
• ### The winning strategy for 700+ on the GMAT

November 20, 2018

November 20, 2018

06:00 PM EST

07:00 PM EST

What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL.

# Bob is 12 years older than Peter. Six years ago Peter was twice younge

Author Message
TAGS:

### Hide Tags

Senior Manager
Joined: 31 Jul 2017
Posts: 494
Location: Malaysia
GMAT 1: 700 Q50 V33
GPA: 3.95
WE: Consulting (Energy and Utilities)
Bob is 12 years older than Peter. Six years ago Peter was twice younge  [#permalink]

### Show Tags

08 Sep 2018, 06:36
2
00:00

Difficulty:

15% (low)

Question Stats:

90% (01:51) correct 10% (02:02) wrong based on 30 sessions

### HideShow timer Statistics

Bob is 12 years older than Peter. Six years ago Peter was twice younger than Bob. How old is Bob?

1. 30
2. 15
3. 10
4. 20
5. 21

_________________

If my Post helps you in Gaining Knowledge, Help me with KUDOS.. !!

Director
Joined: 20 Feb 2015
Posts: 796
Concentration: Strategy, General Management
Re: Bob is 12 years older than Peter. Six years ago Peter was twice younge  [#permalink]

### Show Tags

08 Sep 2018, 07:31
rahul16singh28 wrote:
Bob is 12 years older than Peter. Six years ago Peter was twice younger than Bob. How old is Bob?

1. 30
2. 15
3. 10
4. 20
5. 21

the first statement tells us that
b=12+p
second one tells us that
b-6=2(p-6)

subtracting 1 from 2
p=18
b=12+18=30
A
Board of Directors
Status: QA & VA Forum Moderator
Joined: 11 Jun 2011
Posts: 4227
Location: India
GPA: 3.5
Re: Bob is 12 years older than Peter. Six years ago Peter was twice younge  [#permalink]

### Show Tags

08 Sep 2018, 10:21
rahul16singh28 wrote:
Bob is 12 years older than Peter. Six years ago Peter was twice younger than Bob. How old is Bob?

1. 30
2. 15
3. 10
4. 20
5. 21

b = p + 12

2( b - 6 ) = ( p - 6 )

Or, 2( p + 12 - 6 ) = ( p - 6 )

Or, 2 ( p + 6 ) = p - 6

Or, 2p + 12 = p - 6

Or, p = 18

So, b = 30, Answer must be (A)
_________________

Thanks and Regards

Abhishek....

PLEASE FOLLOW THE RULES FOR POSTING IN QA AND VA FORUM AND USE SEARCH FUNCTION BEFORE POSTING NEW QUESTIONS

How to use Search Function in GMAT Club | Rules for Posting in QA forum | Writing Mathematical Formulas |Rules for Posting in VA forum | Request Expert's Reply ( VA Forum Only )

Senior Manager
Joined: 22 Feb 2018
Posts: 396
Re: Bob is 12 years older than Peter. Six years ago Peter was twice younge  [#permalink]

### Show Tags

08 Sep 2018, 10:28
rahul16singh28 wrote:
Bob is 12 years older than Peter. Six years ago Peter was twice younger than Bob. How old is Bob?

1. 30
2. 15
3. 10
4. 20
5. 21

OA: A

Let Bob's Age be $$B$$
Let Peter's Age be $$B-12$$

$$(B-6) = 2[(B-12)-6]$$

$$B-6 = 2(B-18)$$

$$B-6 = 2B-36$$

$$B = 30$$ years
_________________

Good, good Let the kudos flow through you

Re: Bob is 12 years older than Peter. Six years ago Peter was twice younge &nbs [#permalink] 08 Sep 2018, 10:28
Display posts from previous: Sort by

# Bob is 12 years older than Peter. Six years ago Peter was twice younge

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.