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

Can you find the missing piece of the Porsche?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

I don't get anymore wetter, no matter how much rain falls on me.

Which is Odd One Out and why?

4377

3954

9862

8454

9831

A crime was committed at baker street. Ibrahim Dakota who was shot in the stomach was the main suspect. Sherlock questioned the suspect. The conversation started as:
Sherlock: What's your story, Ibrahim?
Ibrahim: I was walking around baker street and suddenly a man from the back shot me. I ran as fast as I could to save my life".
Sherlock: That is enough (and ask the police to arrest him).

Why does Sherlock think he is the murderer?

What goes up but never comes down?

You need to move three matchsticks to form three squares. Can you do it?

12345 a famous South Indian actor
567 is a path in jumbled form
8 & 10 are same letters
9 is one among the first six alphabets.
WHO AM I?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.