The sum of three consecutive odd numbers is 75 what is the smallest of three numbers? ?

The smallest number would be 23.

     Let "n" represent the smallest odd number.
So the consecutive odd integers would be:
n
n+2
n+4 

Adding these 3 will give you 75.
Here's a breakdown: 

n + n+2 + n+4 = 75  
3n + 6 = 75
3n = 75 - 6
3n = 69 
n = 69/3
n = 23 

So here's how to find the consecutive numbers:
n = 23 < --- (smallest number)
n+2 = 23+2 = 25
n+4 = 23+4 = 27 

So, the three consecutive odd numbers are 23, 25, 27.

23+25+27 = 75

The answer would be (c)