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16 Oct 2019, 01:28
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
82% (01:08) correct
18%
(01:23)
wrong
based on 57
sessions
History
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John is three times as old as Sam. If John will be twice as old as Sam in six years, how old was Sam two years ago?
A. 2
B. 4
C. 6
D. 8
E. 16
A. 2
B. 4
C. 6
D. 8
E. 16
16 Oct 2019, 01:33
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Bunuel
Let the present age of Sam = x
---------------- John --------- Sam
Present -------- 3x ------------- x
In 6 yrs ------ (3x+6) ------- (x+6)
If John will be twice as old as Sam in six years
--> 3x + 6 = 2(x + 6) = 2x + 12
--> x = 6
how old was Sam two years ago = x - 2 = 6 - 2 = 4
IMO Option B
16 Oct 2019, 01:35
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John = 3*Sam
(John+6)= 2* (Sam+6)
3*Sam+ 6=2*Sam+ 12
Sam= 6
—> two years ago,
Sam —2 =6–2= 4 years old
The answer is B
Posted from my mobile device
(John+6)= 2* (Sam+6)
3*Sam+ 6=2*Sam+ 12
Sam= 6
—> two years ago,
Sam —2 =6–2= 4 years old
The answer is B
Posted from my mobile device
