Number Systems - Quant/Math - CAT 2007
Question 4 the day : August 04, 2003
The question for the day is from the topic Number Systems. The question is about finding the remainder of the division of a number by a factor of a second divisor, given the remainder when the original number is divided by the second divisor
Question
When a number is divided by 36, it leaves a remainder of 19. What will be the remainder when the number is divided by 12?
(1) 10
(2) 7
(3) 192
(4) None of these
Correct Choice is (2) and Correct Answer is 7
Explanatory Answer
Let the number be 'a'.
When 'a' is divided by 36, let the quotient be 'q' and we know the remainder is 19
i.e.,  and remainder is 19
or a = 36q + 19
when a is divided by 12, we get
 or 
36q is perfectly divided by 12
Therefore, remainder = 7
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