Question

how many two digit numbers are divisible by 3? chapter 5 class 10 ​

Answer 1

30 two digit number can be divisible by 3

Answer 2

the 2 digit no which are divisible by 3

so the first and last two digit no divisible by 3 is 12 and 99 resp.

here a= 12 an=99 and d = 3

an= a +(n-1)d

99=12+(n-1)3

87/3=n-1

29+1= n

30=n there are 30 two digit no. divisible by 3