If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

Solve the following series:
AZ, GT, MN, __, YB

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

Can you find the mistake in the below statement?

Spot the cat in the picture below

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?