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

 It is currently 22 Oct 2019, 02:10

### 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

# Tom’s Mom is five times as old as him. In 6 years, Tom’s Mom will be

Author Message
TAGS:

### Hide Tags

Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 8025
GMAT 1: 760 Q51 V42
GPA: 3.82
Tom’s Mom is five times as old as him. In 6 years, Tom’s Mom will be  [#permalink]

### Show Tags

03 Oct 2018, 02:27
00:00

Difficulty:

25% (medium)

Question Stats:

72% (01:31) correct 28% (02:01) wrong based on 59 sessions

### HideShow timer Statistics

[Math Revolution GMAT math practice question]

Tom’s Mom is five times as old as him. In 6 years, Tom’s Mom will be three times as old as him. How old is Tom now?

A. 3
B. 4
C. 5
D. 6
E. 7

_________________
MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
"Only $79 for 1 month Online Course" "Free Resources-30 day online access & Diagnostic Test" "Unlimited Access to over 120 free video lessons - try it yourself" NUS School Moderator Joined: 18 Jul 2018 Posts: 1020 Location: India Concentration: Finance, Marketing WE: Engineering (Energy and Utilities) Tom’s Mom is five times as old as him. In 6 years, Tom’s Mom will be [#permalink] ### Show Tags 03 Oct 2018, 02:33 Mom = 5(Tom) or M = 5T After 6 years, M+6 = 3(T+6) 5T+6 = 3T+18 2T = 12 T= 6. D is the answer. _________________ Press +1 Kudos If my post helps! Intern Joined: 09 Sep 2018 Posts: 1 Re: Tom’s Mom is five times as old as him. In 6 years, Tom’s Mom will be [#permalink] ### Show Tags 03 Oct 2018, 03:30 1 It is a flawed question .. initially of Tom's age is 1 then his mum's age will be 5 ... Is this possible??? Posted from my mobile device NUS School Moderator Joined: 18 Jul 2018 Posts: 1020 Location: India Concentration: Finance, Marketing WE: Engineering (Energy and Utilities) Tom’s Mom is five times as old as him. In 6 years, Tom’s Mom will be [#permalink] ### Show Tags 03 Oct 2018, 03:34 1 Arnab1636 wrote: It is a flawed question .. initially of Tom's age is 1 then his mum's age will be 5 ... Is this possible??? Posted from my mobile device In the real world? I don't think so. But in maths, it's possible. The question is correct. _________________ Press +1 Kudos If my post helps! GMAT Club Legend Joined: 12 Sep 2015 Posts: 4016 Location: Canada Re: Tom’s Mom is five times as old as him. In 6 years, Tom’s Mom will be [#permalink] ### Show Tags 03 Oct 2018, 09:51 Top Contributor MathRevolution wrote: [Math Revolution GMAT math practice question] Tom’s Mom is five times as old as him. In 6 years, Tom’s Mom will be three times as old as him. How old is Tom now? A. 3 B. 4 C. 5 D. 6 E. 7 Tom’s Mom is five times as old as him. Let T = Tom's PRESENT age So, 5T = Mom's PRESENT age This also means: Let T + 6= Tom's age IN 6 YEARS and 5T + 6 = Mom's age IN 6 YEARS In 6 years, Tom’s Mom will be three times as old as Tom. In other words: (Mom's age IN 6 YEARS) = 3(Tom's age IN 6 YEARS) Or we can write: 5T + 6 = 3(T + 6) Expand: 5T + 6 = 3T + 18 Subtract 3T from both sides: 2T + 6 = 18 So: 2T = 12 T = 6 Answer: D RELATED VIDEO FROM OUR COURSE _________________ Test confidently with gmatprepnow.com VP Joined: 09 Mar 2016 Posts: 1230 Tom’s Mom is five times as old as him. In 6 years, Tom’s Mom will be [#permalink] ### Show Tags 03 Oct 2018, 12:49 Tom age x Toms mom age 5x in 6 years toms mom will be 3x Toms mom age in 6 years = 5x+6 Toms age in 6 years will be three times less than his mom age; so, to make toms age equal to his moms age multiply toms age by 3. i.e 3(x+6) hence we can equate Toms and his mom`s ages 5x+6=3(x+6) 5x+6=3x+18 2x = 12 x = 6 Math Revolution GMAT Instructor Joined: 16 Aug 2015 Posts: 8025 GMAT 1: 760 Q51 V42 GPA: 3.82 Re: Tom’s Mom is five times as old as him. In 6 years, Tom’s Mom will be [#permalink] ### Show Tags 05 Oct 2018, 01:37 => We can set up this question using the IVY approach. “Is” can be converted to “=” and “times” can be converted to the multiplication sign “x”. Let m and t be Tom’s Mom’s age and Tom’s age now, respectively. Then $$m = 5t$$ since Tom’s mom is five times as old as Tom. We also have $$m + 6 = 3(t + 6)$$ since Tom’s mom will be three times as old as Tom in 6 years. Plugging $$m = 5t$$ into the second equation yields $$5t + 6 = 3t + 18$$ or $$2t = 12.$$ So, $$t = 6$$. Therefore, the answer is D. Answer: D _________________ MathRevolution: Finish GMAT Quant Section with 10 minutes to spare The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy. "Only$79 for 1 month Online Course"
"Free Resources-30 day online access & Diagnostic Test"
"Unlimited Access to over 120 free video lessons - try it yourself"
Re: Tom’s Mom is five times as old as him. In 6 years, Tom’s Mom will be   [#permalink] 05 Oct 2018, 01:37
Display posts from previous: Sort by