Sum of the numbers from 1 to 20 is  Choose the correct answer:
A) 210
B) 110
C) 220
D) 105
E) None of these
Explanation: Sum of first n natural numbers = 1 + 2 + 3 + ..... n = n(n+1)/2   Substitute n = 20.   So S20=20×21/2=210   Correct Option: 210
<result>A</result>
Sum of the numbers from 1 to 20 is