what is the sum of all integers between 99 and 301?
a)40000
b)20000
c)40200
d)20200

• The Sum of first n consecutive integers = n* (n+1)/2
  Sum of the first 99 integers = (99 * 100)/2=4950
  Sum of first 301 integers = (300* 301)/2=45150
  Hence Sum of integers between 99 and 301 is
  45150-4950=40200(ans)
  
• 12 years agoHelpfull: Yes(24) No(4)
• Even integers are 100,102,104,....300
  now 100+300 =400
  102+298 =400
  104+296 =400
  ..........
  ..........
  198+202 =400... this is 50th summation..
  and last term is 200
  so the answer is 50*400 + 200 = 20200
• 12 years agoHelpfull: Yes(11) No(5)