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# 10 years ago, John was thrice as old as Jimmy. Fifteen years since

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Senior Manager
Joined: 17 Oct 2016
Posts: 257
Location: India
Concentration: General Management, Healthcare
GMAT 1: 640 Q40 V38
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WE: Pharmaceuticals (Health Care)
10 years ago, John was thrice as old as Jimmy. Fifteen years since  [#permalink]

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18 Jan 2019, 08:51
1
00:00

Difficulty:

35% (medium)

Question Stats:

79% (02:31) correct 21% (02:42) wrong based on 20 sessions

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10 years ago, John was thrice as old as Jimmy. Fifteen years hence, John will be 4/3 times as old as Jimmy. What is the sum of their ages today?

A. 10

B. 33

C. 30

D. 40

E. 44

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Chasing the dragon
Veritas Prep GMAT Instructor
Joined: 16 Oct 2010
Posts: 9706
Location: Pune, India
Re: 10 years ago, John was thrice as old as Jimmy. Fifteen years since  [#permalink]

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18 Jan 2019, 08:58
fitzpratik wrote:
10 years ago, John was thrice as old as Jimmy. Fifteen years hence, John will be 4/3 times as old as Jimmy. What is the sum of their ages today?

A. 10

B. 33

C. 30

D. 40

E. 44

Say 10 yrs ago, Jimmy was M yrs old. Then 10 yrs ago, John's age was 3M.

After 25 years (10 previous yrs + 15 future yrs), Jimmy will be M + 25 and John will be 3M + 25

Given: (3M + 25) = (4/3)*(M + 25)

9M + 75 = 4M + 100
M = 5
3M = 15
Sum of their ages 10 yrs ago was 5+15 = 20
Sum of their present ages = 20+10+10 = 40

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Karishma
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Re: 10 years ago, John was thrice as old as Jimmy. Fifteen years since  [#permalink]

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18 Jan 2019, 21:46
What is the question source? Use of 'hence' is awkward.
Re: 10 years ago, John was thrice as old as Jimmy. Fifteen years since   [#permalink] 18 Jan 2019, 21:46
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