Find the sum of all 2 digit numbers divisible by 3.  Choose the most appropriate option.
A) 1535 B) 1425 C) 1325 D) 1225 E) 1665
All 2 digit numbers divisible by 3 are :   12, 51, 18, 21, ..., 99.   This is an A.P. with a = 12 and d = 3.   Let it contain n terms. Then,   12 + (n - 1) x 3 = 99 or n = 30.   Therefore, Required sum = 30/2 x (12+99) = 1665.   Answer is 1665.
<result>E</result>
Find the sum of all 2 digit numbers divisible by 3.