What is the sum of first 15 natural numbers?
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Answer:
The number series 1, 2, 3, 4, . . . . , 14, 15. Therefore, 120 is the sum of positive integers upto 15.
Answered by
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Answer:
Answer is 120
Step-by-step explanation:
The sum of first n natural numbers is 2n(n+2)/2
215(16)/2
=15×8=120
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