Question

find the sum of all odd numbers between 200 and 300

Answer 1

Answer:

Sn=n/2(a+l)

=50/2(201+299)

=25×500

Sn=12500

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Answer 2

ANSWER:

12500

201+203+205+207.....+299

50/2 *(201+299)

= 25*500

=12500