The sum of the first 100 numbers, 1 to 100 is always divisible by
Choose one:
A) 2
B) 2 and 4
C) 2 , 4 and 8
D) 2 , 4 and 9
E) none of these

Rationale: explanation : the sum of the first 100 natural numbers = ( 100 x 101 ) / 2 = ( 50 x 101 ) as 101 is an odd number and 50 is divisible by 2 , so the sum is always divisible by 2 . answer : option a
Answer: A