The sum of odd integers from 10 to 100 is
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Step-by-step explanation:
Sum of odd consecutive integers from 1 to 100 = (Sum of all consecutive integers from 1 to 100) - (Sum of even consecutive integers from 1 to 100). Sum of odds = (100 x 101/2) - [ (50 x 51)] = 5050 - 2550 = 2500.
Answered by
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Answer:
2475
Step-by-step explanation:
11 + 13 + 15+ .......+ 99
= (1 + 3 + 5 + 7 +9 +11 + 13+........+ 99) -(1 + 3 + 5 +...+ 9)
= 50^2 - 5^2
= 2500 - 25
= 2475
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