The sum of three consecutive odd numbers is 153. What is the first number in sequence?
49
Let three consecutive numbers be n-2, n and n+2
The sum of three consecutive odd numbers is:
n-2+ n+n+2 = 153
3n =153
n = 153 ÷ 3
n = 51
n-2 = 51-2 = 49
n+2 = 51+2 = 53
The three consecutive odd numbers in sequence are 49, 51 and 53.
Thus, the 1st number in sequence is 49.