Question

Find the valus of
How many two digit numbers are divisible by 3

Answer 1

Answer:

30

Step-by-step explanation:

How many two digit numbers are divisible by 3?

Join Amity Pune’s BBA/MBA program.

Two digit numbers which are divisible by 3 are :-

12 , 15 , 18 , 21 ,………………….., 99.

This is an A.P in which a=12 , d=15–12=3. tn = 99. and n=?.

tn= a+ (n-1).d.

99=12+(n-1).3

87/3 = (n-1)

29 = n-1

or. n=29+1 = 30. Answer.

It should be an ap whose first term is 12and last term is 99

12,15,18,21- - - - - - -99

a=12

l=99

n=?

d=3

l=a+(n-1)d

99=12+(n-1)3

87/3=n-1

29=n-1

n=30

Hope,your doubt can be solved