Question

The sum of three consicutive odd numbers is 21. Find the number

Answer 1

Hey...!!!

Let the numbers be x, x + 2 and x + 4

So,

X + x + 2 + x + 4 = 21

3x + 6 = 21

3x = 21 - 6

3x = 15

X = 15/3

X = 5

So, numbers are

5

( 5 + 2 ) = 7 and,

( 5 + 4 ) = 9

Hope it helps...!!!

Answer 2

let x be the required first odd number , (x+2) be the second odd no. and (x+2+2) be the third odd number.
          x+(x+2)+(x+2+2)=21
          ........(solve it) 



OR, 
let (x-2), x and (x+2) be the three odd consecutive numbers.
             (x-2)+x+(x+2)=21






The answer is 5,7 and 9.