It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

What 5-letter word typed in all capital letters can be read the same upside down?

A girl was standing near the window thinking something. All of a sudden she decides something and throws something out of the window. She dies very soon after throwing it. She was perfectly healthy and had no disease or allergy. No one killed her and she did not commit suicide.

Can you think of any possible explanation that is logical as well for what happened there?

You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple.
Now all your friends have one apple each, yet there is an apple remaining in the basket.
How?

Can you find out the remainder when 3^300 is divided by 5?

Spot 5 differences in two Christmas tree below:

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?