yashikaaggarwal wrote:
=> Sum of first n positive integer is = n(n+1)/2
=> Sum of first 100 positive integer is = 100(100+1)/2
=> 100*101/2
=> 5050
factors of 5050 = 2*5*5*101
among all factors only 2 is the only even prime factor of 5050,
therefore 5050 is divisible by 2 only
therefore, only statement 1 is true.
IMO A
how are we deriving the formula for Sum of first n positive integer is => n(n+1)/2?
Statistics : Posted by Debaditya123 • on 23 Jun 2020, 10:53 • Replies 11 • Views 12729
