Aptitude - Numbers - Discussion

Discussion Forum : Numbers - General Questions (Q.No. 76)
76.
A number when divide by 6 leaves a remainder 3. When the square of the number is divided by 6, the remainder is:
1
2
3
Answer: Option
Explanation:

Let x = 6q + 3.

Then, x2 = (6q + 3)2

   = 36q2 + 36q + 9

   = 6(6q2 + 6q + 1) + 3

Thus, when x2 is divided by 6, then remainder = 3.

Discussion:
11 comments Page 2 of 2.

Prasanna isane said:   3 years ago
As we know that, If a number or square of a number is divided by the same number, a remainder is same in both the conditions.
(1)


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