Question

Q.1 1+2+3+4........................+1003=? A.503506
B.503560
C.505306
D.530506​

Answer 1

Answer

Option B

solution

we know that sum of n term= n(n+1)/100

given question

n = 1003

sum= 1003*(1003+1)/2

sum = 1003*1004/2

sum = 1003*502= 503506

Answer 2

Answer:

Here,

n = 1003

First term = 1

Last term = 1003

In an A.P. :-

Sum = n ( First term + last term)/2

= 1003 ( 1 + 1003 )/2

= 1003( 1004 )/2

= 1003 x 502

= 503506

Hence, option (a.) is correct.