Question

Vimal asked Dharani to find the total of all the numbers insides the $3\times 3$ box marked in the calendar. Dharani found it very quickly using a easy method. What is her answer?

Answer 1

Easy way to find the total of all the numbers inside the $3\times 3$ box inside the calendar:

1. Select the middle number.
2. Multiply it with 9.

$\therefore$ The answer is the total.
In this case,
1. Middle number is 20.
2. $9\times 20=180$

$\therefore$ 180 is the total of all the numbers inside the $3\times 3$ box.