Question

how many two dogit numbers leave the remainder 1 when divisible by 5?

Answer 1

The first two digit number dividable by 5 is 10. Therefore, first two digit number which would leave remainder 1 when divided by 5 is 11.

The last two digit number divisible by 5 is 95. Therefore, last two digit number which would leave remainder 1 when divided by 5 is 96.Now, we have,
 Ans. There are 18 two digit number leave the remainder 1 when divided by 5.