Question

How many two digit numbers are divisible by 3?

• A. 28
• B. 30
• C. 31
• D. 35

Answer 1

Answer:

B. 30

$n=(a_n-a_1)/d + 1$

$a_n=99,a_1=12,d=3$

$n=\frac{99-12}{3}+1$

$=29+1=30$