In the four images below, can you find the odd one out?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

When it is alive we sing, when it is dead we clap our hands. What is it?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

How many times can you subtract the number two from the number fifty?

You walk into a room and see a bed. On the bed, there are two dogs, five cats, a giraffe, six cows, and a goose. There are also three doves flying above the bed. How many legs are on the floor?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

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