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22 Apr 2016, 04:31
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
92% (01:13) correct
8%
(02:28)
wrong
based on 321
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A certain number X when divided by 243 leaves a remainder of 98. Which of the following can be subtracted from X to make X divisible by 81?
A. 17
B. 27
C. 37
D. 47
E. 57
A. 17
B. 27
C. 37
D. 47
E. 57
22 Apr 2016, 10:19
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X=243y+98
so X/81 = 243y/81 + 98/81
since 243 is divisible by 81 the remainder of X/81 is remainder of 98/81 that is 17
Therefore subtracting 17 from X will make it divisible by 81
hence A is the answer
so X/81 = 243y/81 + 98/81
since 243 is divisible by 81 the remainder of X/81 is remainder of 98/81 that is 17
Therefore subtracting 17 from X will make it divisible by 81
hence A is the answer
General Discussion
22 Apr 2016, 10:24
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Bunuel
Least possible value of the number is 243 + 98 = 341
Further it is given the number must be divisible by 81 .
341/81 = Gives remainder as 17
So, 17 must be subtracted from the number , answer is (A)
