Q. The sum of odd numbers from 10 to 60 is
✅ Correct Answer: (D)
875
Explanation: Sum to first n odd numbers {(59+1) /2}², because last odd number is 59. After solving above equation we got 900.
And sum to odd number 1 to 10 {(9+1) /2}² = 25 , hence 900-25 = 875
And sum to odd number 1 to 10 {(9+1) /2}² = 25 , hence 900-25 = 875
Explanation by: Virat Bhati
Sum to first n odd numbers {(59+1) /2}², because last odd number is 59. After solving above equation we got 900.
And sum to odd number 1 to 10 {(9+1) /2}² = 25 , hence 900-25 = 875
And sum to odd number 1 to 10 {(9+1) /2}² = 25 , hence 900-25 = 875