If the sum of three consecutive odd numbers is 81 find the greatest odd number of this series ........

Quantitative Aptitude (RRB NTPC) Number System

If the sum of three consecutive odd numbers is 81 . find the greatest odd number of this series?

Let the first number be x

The 2nd number is x + 2

The 3rd number is x + 4

Sum of these 3 numbers is 81:

x + ( x + 2) + ( x + 4 ) = 81

Solve x:

x + ( x + 2) + ( x + 4 ) = 81

x + x + 2 + x + 4 = 81

3x + 6 = 81

3x = 75

x = 25

Greatest number = x + 4 = 25 + 4 = 29

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