Question

if the devision N÷5 leaves a remainder of 1, what might be the one's digit of N ?​

Answer 1

Since, 5 only divides numbers which have one's digit 0 or 5, to have remainder as 1, the one's digit should be

0+1=1

5+1=6

Thus, answer is 1 or 6

Answer 2

Answer:

The unit's digit is either 6 or 1

Step-by-step explanation:

As (N-1) must always contain 5 as one of its prime factors. If (N -1) is of the form 5*(an even number), then the unit's digit of N will be 1.

Else, if (N-1) is of the form 5*(an odd number), then the unit's digit of N will be 6.

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