Question

what is the sum of first ten digit odd number ​

Answer 1

The first 10 odd numbers are

• 1, 3, 5, 7, 9, 11, 13, 15, 17,19

The standard mathematical method of getting the sum of a series would be to add the first number of the series to the last number of the series and multiply the sum by one half the number in the series.

• 1 + 19 = 20

20 × 5 = 100 ( there are 10 odd numbers in the series, so half of them would be 5.

• Thus the sum is 100

Answer 2

Answer:

1+3+5+7+9+11+13+15+17+19=100

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