Question

The sum of 3 consecutive odd numbers is 51. What is the second number in this sequence?

Answer 1

let 3 nos be a-2 a and a+2
hence 3a=51
a=17
second no is 17

Answer 2

Let the consecutive odd numbers be x,x+2, x+4

Given,

x + (x+2) +(x+4) = 51

3x + 6 = 51


3x = 51-6

3x = 45

x = 45/3 = 15

So, the three odd numbers are 15, 17 and 19 respectively