Sum of the numbers from 1 to 20 is
Choose the correct choice from the following choices.
A) 210	B) 110	C) 220	D) 105	E) 100
Explanation: Sum of first n natural numbers = 1 + 2 + 3 + ..... n =n+1/2   Substitute n = 20.   =20*21/2= 
<gadget id="calculator">20*21/2</gadget>
<output>210</output>
210   210NSWER IS 210
<result>A</result>
Sum of the numbers from 1 to 20 is