Question

3. How many three-digit numbers are divisible by 5​

Answer 1

Answer:

180

Step-by-step explanation:

The smallest and the largest numbers of three digits, which are divisible by 5 are 100 and 995 respectively,

So, the sequence of three digits numbers which are divisible by 5 is 100,105,110,...,995.

Answer 2

Answer:

180 3-digit numbers are divisible by 5

Step-by-step explanation:

ap --> 100 , 105 , 110 - - - 995

t1 = a =100

d = t2 - t1 = 105 - 100 = 5

tn = a + (n-1) × d

995 = 100 + (n - 1) × 5

995 = 100 + 5n - 5

995 = 95 + 5n

995 - 95 = 5n

900 = 5n

900/5 = n

n = 180