What is the sum of the first 25 natural numbers (starting from 1)? Pick one:	A) 325	B) 350	C) 375	D) 400	E) 425
The sum of n natural numbers = n*(n+1) / 2 = 25*26/2= 
<gadget id="calculator">25*26/2</gadget>
<output>325</output>
325   The answer is 325.
<result>A</result>
What is the sum of the first 25 natural numbers (starting from 1)?