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Senior Manager
Joined: 20 Jan 2010
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Schools: HBS, Stanford, Haas, Ross, Cornell, LBS, INSEAD, Oxford, IESE/IE
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1. Roy is now 4 years older than Erik and half of that amount older than Iris. If in 2 years, Roy will be twice as old as Erik, then in 2 years what would be Roy’s age multiplied by Iris’s age?
(a) 8
(b) 28
(c) 48
(d) 50
(e) 52

[Reveal] Spoiler:
OA=C

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Manager
Joined: 26 May 2005
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Kudos [?]: 41 [0], given: 1

r=e+4 -- 1st
4=i+2 .. 2nd

in 2 years
r+ 2 = 2 * (I+2) .. 3rd

solving 1st and 3rd equation we get r=6, i = 2, and using 2nd equation we get i=4

so in 2 years r=8 and i=6, product =48

C
Senior Manager
Joined: 20 Jan 2010
Posts: 282
Schools: HBS, Stanford, Haas, Ross, Cornell, LBS, INSEAD, Oxford, IESE/IE
Followers: 10

Kudos [?]: 99 [0], given: 117

Hmm! would you please! explain a bit how did u get 2nd & 3rd equations?
as if I take "If in 2 years, Roy will be twice as old as Erik" the n it means that
r+2=2e -- 2nd

and I didn't get these words "and half of that amount older than Iris" plzz! explain it.

Any help would be highly appreciated.
_________________

"Don't be afraid of the space between your dreams and reality. If you can dream it, you can make it so."
Target=780
http://challengemba.blogspot.com
Kudos??

GMAT Club team member
Joined: 02 Sep 2009
Posts: 11621
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Kudos [?]: 9601 [1] , given: 829

1
KUDOS
AtifS wrote:
Hmm! would you please! explain a bit how did u get 2nd & 3rd equations?
as if I take "If in 2 years, Roy will be twice as old as Erik" the n it means that
r+2=2e -- 2nd

and I didn't get these words "and half of that amount older than Iris" plzz! explain it.

Any help would be highly appreciated.

Roy is now 4 years older than Erik --> R=E+4
Roy is now ... half of that amount older than Iris --> R=I+\frac{4}{2}=I+2 (half of the amount of 4)
In 2 years, Roy will be twice as old as Erik --> R+2=2(E+2) (in 2 years for both Roy and Eric)

Then in 2 years what would be Roy’s age multiplied by Iris’s age --> (R+2)(I+2)=?

Solving: R=6 and I=4 --> (R+2)(I+2)=48
_________________
Senior Manager
Joined: 20 Jan 2010
Posts: 282
Schools: HBS, Stanford, Haas, Ross, Cornell, LBS, INSEAD, Oxford, IESE/IE
Followers: 10

Kudos [?]: 99 [0], given: 117

Bunuel wrote:
AtifS wrote:
Hmm! would you please! explain a bit how did u get 2nd & 3rd equations?
as if I take "If in 2 years, Roy will be twice as old as Erik" the n it means that
r+2=2e -- 2nd

and I didn't get these words "and half of that amount older than Iris" plzz! explain it.

Any help would be highly appreciated.

Roy is now 4 years older than Erik --> R=E+4
Roy is now ... half of that amount older than Iris --> R=I+\frac{4}{2}=I+2 (half of the amount of 4)
In 2 years, Roy will be twice as old as Erik --> R+2=2(E+2) (in 2 years for both Roy and Eric)

Then in 2 years what would be Roy’s age multiplied by Iris’s age --> (R+2)(I+2)=?

Solving: R=6 and I=4 --> (R+2)(I+2)=48

Thanks for explanation, Actually i couldn't get the equation with I otherwise I had solved other equations instead of this one

R=I+\frac{4}{2}=I+2 (half of the amount of 4)

looks like have to work on Word Problems.
thanks again and Kudos
couldn't get this part (half of the amount of 4)
_________________

"Don't be afraid of the space between your dreams and reality. If you can dream it, you can make it so."
Target=780
http://challengemba.blogspot.com
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