Question

How many numbers greater than 186 and less than 987 are divisible by 10?

• A. $80$
• B. $70$
• C. $65$
• D. $75$

Answer 1

The correct option is A $80$

Number greater than 186 and divisible by 10 is 190.
Number less than 987 and divisible by 10 is 980.

Numbers greater than 186 and divisible by 10 can be written as $190+10n\text{where}n\text{is a whole number}$

$980=190+10n\Rightarrow 790=10n\Rightarrow 79=n$

On considering 190 also, there are 80 numbers, divisible by 10, that are greater than 186 and less than 987.