Q613
What is the sum of first 20 terms of the following series? 1 × 2 + 2 × 3 + 3 × 4 + 4 × 5 + . . . . . . . .
A.
3080
AnswerB.
3160
C.
3240
D.
2940
Answer: Option A
Solution
Answer: Option A
Solution:
Aptitude · Q613
Number System
Competitive Exams · Aptitude · question 613