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Question

The remainder when,
1010(1010+1)(1010+2) is divided by 6 is ______.

A
2
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B
4
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C
0
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D
6
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Solution

The correct option is B 0
1010 when divided by 6 will give a remainder equal to 410
Next, 410 can be written as (42)5 and so the remainder comes out to be (1612)5 i.e. 45
45 can be written as 210 or 322
This when divided by 6 would yield a remainder of 22 i.e. 4
Thus, the remainder when 1010.(1010+1)(1010+2) is divided by 6 becomes 4×5×6
120 when divided by 6 leaves remainder zero, implying that the remainder is zero.

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