CSC
Company
Numerical Ability
Number System
The sum of first 45 natural numbers is:
A. 1035 B. 1280
C. 2070 D. 2140
Read Solution (Total 2)
-
- The sum of n natural Nos is {n*(n+1)}/2
(45*46)/2=1035
Answer option is A - 12 years agoHelpfull: Yes(27) No(1)
- We use formula here n*(n+1)/2
Where n=45
45*(45+1)/2=1035
Option a is correct - 3 years agoHelpfull: Yes(0) No(0)
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