Question

The sum of all two digit numbers divisible by 3 is :

• A. 1665
• B. 1723
• C. 1785
• D. 1632

Answer 1

Answer:

A. 1665

First two digit number divisible by 3 = 12 Last two digit number divisible by 3 = 99 Common difference, (d)=3 99=12+(n−1)3 n=30 sum=30/2(12+99) =15×111=1665