. Sum of odd numbers between 100 and 200 is:
A. 7500
B. 751
C. 2500
D. 50
Best Answer
Answer ||| A
Solution |||
Odd numbers between 100 and 200 = n = 50
a = 101 , d = 2
Sum = (n/2)(2a+(n-1)d)
⇒ Sum = (50/2)(2×101+(50-1)×2)
⇒ Sum = 25×(202+98) = 25×300 = 7500
Related questions
