### The average of 7 consecutive numbers is 20. The largest of these numbers is-

A. 20 B. 22 C. 23 D. 24 Answer: Option C

### Solution(By Apex Team)

Let the number be x, x + 1, x + 2, x + 4, x + 5 and x + 6 Then, $\begin{array}{l}\Rightarrow\left(\Large\frac{x+(x+1)+(x+2)+(x+3)+(x+4)+(x+5)+(x+6)}{7}\right)=20\\ \Rightarrow\ 7x+21=140\\ \Rightarrow\ 7x=119\\ \Rightarrow\ x=17\\ \text{∴ Largest number}\\ \text{= x + 6 = 17 + 6}\\ \text{= 23}\end{array}$

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