4!

Refer to the 1st square (top left) :  6 * 3 = 18

2nd square:  (top right): 9 * 7= 63

3rd square (bottom left): 6 * 4 = 24

hence for the last square:  7 * 6 is 42..  Hence the number is 4!

It is 0.

8 stands for August,
5 stands for May
4 stands for April
11 stands for November

First letter of each  word equals AMAN, hence he is the murderer.

It seems that the weighing machine detects the colour (red in case of strawberry and cherries).

So the person peeled the water melon and took the red part to weigh it.

Since it was red, the machine could calculate the weigh it.

The girl’s response should be:

“I’ll be very happy and would cherish this happiness with my husband.”
There is no need to be negative about the news!

Smoke!

Snail

It has all numbers from 0 to 9 listed in alphabetical order.

Probability of picking a red ball is 1/3.

When the box with black box is opened, probability of getting the red ball from the last box is 2/3 because we have taken out a black ball.
While, if you open the first box, the probability is still 1/3.

Hence, we should change the box to increase the probability of getting a red ball.

Vin told him to use 1 nut from each of the other 3 tires into this one.