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Updated on: 07 Jun 2017, 06:54
Originally posted by Mina Satti on 07 Jun 2017, 02:06.
Last edited by Bunuel on 07 Jun 2017, 06:54, edited 2 times in total.
Last edited by Bunuel on 07 Jun 2017, 06:54, edited 2 times in total.
Renamed the topic and edited the question.
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C
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:
74% (00:49) correct
26%
(00:55)
wrong
based on 167
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Not Attempted Yet
If (x + 3)/10 is a positive integer, then the remainder, when x is divided by 5 is?
A) 0
B) 1
C) 2
D) 3
E) 4
A) 0
B) 1
C) 2
D) 3
E) 4
07 Jun 2017, 02:29
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So x +3 = 10k ( k is an integer)
So x= 10k-3 i.e. 7,17,27...
Now divide any of the above number by 5
The remainder wl always be 2
Posted from my mobile device
So x= 10k-3 i.e. 7,17,27...
Now divide any of the above number by 5
The remainder wl always be 2
Posted from my mobile device
07 Jun 2017, 02:45
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Another way to solve such questions is to take the minimum value of x such that the expression (x+3)/10 is a positive integer.
I can take x = 17, meaning (x+3)/10 = 2.
Hence, when 17 is divided by 5 remainder is 2. Hence C.
I can take x = 17, meaning (x+3)/10 = 2.
Hence, when 17 is divided by 5 remainder is 2. Hence C.
