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Susan is now 10 years younger than Jane. If in five years, Jane will b
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13 Apr 2021, 05:53
13 Apr 2021, 05:53
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Question Stats:
75% (01:27) correct
25% (01:43) wrong based on 12 sessions
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Susan is now 10 years younger than Jane. If in five years, Jane will be twice as old as Susan, how old will Susan be in 3 years?
A. 6
B. 8
C. 11
D. 14
E. 18
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
A. 6
B. 8
C. 11
D. 14
E. 18
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
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Joined: 10 Apr 2015
Posts: 6218
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Re: Susan is now 10 years younger than Jane. If in five years, Jane will b
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13 Apr 2021, 05:56
13 Apr 2021, 05:56
1
Carcass wrote:
Susan is now 10 years younger than Jane. If in five years, Jane will be twice as old as Susan, how old will Susan be in 3 years?
A. 6
B. 8
C. 11
D. 14
E. 18
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
A. 6
B. 8
C. 11
D. 14
E. 18
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
Let S = Susan's PRESENT age
So, S + 10 = Jane's PRESENT age
So....
S +5 = Susan's age IN 5 YEARS
S + 10 + 5 = Jane's age age IN 5 YEARS
In five years, Jane will be twice as old as Susan
We can write: S + 10 + 5 = 2(S +5)
Expand and simplify: S + 15 = 2S + 10
Solve: S = 5
So, Susan's PRESENT age is 5
So, in 3 years, Susan will be 8 years old.
Answer: B
Cheers,
Brent
Re: Susan is now 10 years younger than Jane. If in five years, Jane will b
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14 Apr 2021, 07:22
14 Apr 2021, 07:22
1
S=J−10
2(S+5)=(J+5)
2(J−10+5)=(J+5)
2J−10=J+5
J=15
S=15−10=5
S+3=8
Ans B
2(S+5)=(J+5)
2(J−10+5)=(J+5)
2J−10=J+5
J=15
S=15−10=5
S+3=8
Ans B
