Question

how many numbers between 1 and 200 are multiples of 5 and are divisible by 3

Answer 1

15,30,45,60,75,90,105,120,135,150,165,180,195
13no are divisible by 3and multiple by5

Answer 2

Difference = 5×3 = 15

Last term = 195

Last term =15 + (n- 1)d

180 =(n - 1)15

180/15 = n-1

12 = n -1

12 + 1 = n

13 = n

Hence, there are 13 numbers

I hope this will help you

-by ABHAY