Question

find how many teo digit numbers divisible of 3 ​

Answer 1

Answer:

30

Step-by-step explanation:

We use the AP formula

tn=a+(n-1)d

a=first term=12

d=common difference=3

tn=last term here=99

99=12+(n-1)3

99=12+3n-3

99=9+3n

99-9=3n

90=3n

90/3=n

30=n

Answer 2

Answer:

We know that the first number is 3

We are using AP and then

a=3

d=3

And

An=99

Then,

a+(n-1)d=99

3+(n-1)3=99

(n-1)=23

n=24

Since 24 number of two digit are divisible by 3