Question

how many 3digit natural number are divisible by 5​

Answer 1

Answer:

180

three digit no divisible by 5

100,105,110..............,995

it form an AP

a=100,d=5,an=995

WKT

an=a+(n-1)d;

995=100+(n-1)5;

885=(n-1)5;

179=n-1;

n=180

therefore ans is 180.