### If a, b, c, d, e are five consecutive odd numbers, their average is.

A. 5 (a + 4) B. $\Large\frac{\text { abcde }}{5}$ C. 5 (a + b + c + d + e) D. None of these Answer: Option D

### Solution(By Apex Team)

$\begin{array}{l}\text{Clearly,}\\ \text{b = a + 2}\\ \text{c = a + 4}\\ \text{d = a + 6}\\ \text{e = a + 8}\\ \text{∴ Average}\\ \begin{array}{l} =\Large\frac{a+(a+2)+(a+4)+(a+6)+(a+8)}{5} \\ =\left(\Large\frac{5 a+20}{5}\right) \\ =(a+4) \end{array}\end{array}$

A. 20
B. 21
C. 28
D. 32

A. 18
B. 20
C. 24
D. 30

A. 10 years
B. 10.5 years
C. 11 years
D. 12 years