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

During a secret mission, an agent gave the following code to the higher authorities
AIM DUE OAT TIE MOD

However, the information is in one word only and the rest are fake. To assist the authorities in understanding better, he also sent them a clue, If I tell you any one character of the code, you can easily find out the number of vowels in the codeword.

Can you find out the code word?

One evening there was a murder in the home of a married couple, their son and daughter. One of these four people murdered one of the others. One of the members of the family witnessed the crime.

The other one helped the murderer.

These are the things we know for sure:

1. The witness and the one who helped the murderer were not of the same sex.

2. The oldest person and the witness were not of the same sex.

3. The youngest person and the victim were not of the same sex.

4. The one who helped the murderer was older than the victim.

5. The father was the oldest member of the family.

6. The murderer was not the youngest member of the family.

Who was the murderer?

Where do you go to learn how to make ice cream?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

Identify The phrase in the picture.

What breaks yet never falls, and what falls yet never breaks?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

Can you tell a 3D object that has just two surfaces?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?