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13 Nov 2020, 20:23
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
85%
(hard)
Question Stats:
35% (01:31) correct
65%
(01:33)
wrong
based on 86
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The sum of ages of two twins - Max and Michael doubled in ten years. What will be their age after ten years from now?
A) 20
B) 30
C) 40
D) 25
E) 35
A) 20
B) 30
C) 40
D) 25
E) 35
13 Nov 2020, 20:48
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We need to find their age after 10 years from now. They are twins, so their ages is same and let the present age be A.
According to the question,
2*(A+A)=(A+10)+(A+10)
A=10
Hence, the age 10 years from now is 20, given in option A.
Posted from my mobile device
According to the question,
2*(A+A)=(A+10)+(A+10)
A=10
Hence, the age 10 years from now is 20, given in option A.
Posted from my mobile device
14 Nov 2020, 08:25
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gmatcafe
The sum of ages of two twins - Max and Michael doubled in ten years. What will be their age after ten years from now?
In ten years, the sum of two ages will increase by 20. If something doubles when you increase it by 20, then it is equal to 20. So at the outset, the sum of their ages is 20, and each of the twins is 10 years old.
Now it's not at all clear what the question is asking for, because from the wording, we have no idea when the question takes place. It describes a ten year period during which the sum doubled, but did those ten years take us to "now", in the world of the question? There's no way to know. If we assume that's what the question means, then in ten years, they'll both be 30. But there's a problem with the wording that makes the question unanswerable (and technically, because the question asks for their age "after" ten years from now, and not for their age "ten years from now", the answer could be anything larger than 30, so there's more than one wording issue) -- what is the source?
