Question

how many two digit number are divisible by 3? explain​

Answer 1

Solution :

2 digit no divisible by 3 are 12,15,18,21.....,99

let them be a1,a2,a3......and so on

a2-a1=15-12=3

a3-a2=18-15=3

so,a=12&d=3

and we also know last term of series =99

now,an=a+(n-1)d

99=12+(n-1)3

87=(n-1)3

n=30

99is the 30th term

∴ total terms are 30

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Answer 2

Answer:

33 numbers

Step-by-step explanation:

3×1=3,3×2=6..........till3×33

therefore 99 is the last term.

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