Question

Look at the calendar below.
Let us mark a 3 × 3 box (9 dates) on the calendar and see some magic.

Take the smallest number	3
Add 8 to it	+8
=	11
Multiply it by 9	×9
Total	99

Now you choose any 3 × 3 box from a calendar and find the total in the same way.

Answer 1

Take the smallest number = 4

Adding 8 to it, we get 12.

Multiplying it by 9, we get
12 $\times$ 9 = 108

So, the sum of all the numbers in the selected box is 108.