Question

Nine numbers are taken from calender as shown

14 15 16

21 22 23

28 29 30

If the sum of all given numbers is S, then the value of $\frac{S}{9}$ equals to ____.

• A. 21
• B. 22
• C. 23
• D. 29

Answer 1

The correct option is B 22

If sum of all the number is S, then the value of $\frac{S}{9}$ is equal to middle number which is equal to 22.

Alternatively, It can be verified

x - 8 x - 7 x - 6

x - 1 x x + 1

x + 6 x + 7 x + 8

adding all we get sum as 9x and $\frac{9x}{9}=x$

which is the middle number.