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

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

Peter wakes up daily to pick up his cycle and crosses the border between Spain and France daily with a bag on his shoulder. He is investigated daily by the officials but they don't find anything suspicious.

If we tell you that he is smuggling something what would it be?

Identify the movie name through below Rebus containing Pi Mouse and coconut tree..

Can it be possible to build a house that has all its four walls facing towards the South?

What goes up but never comes down?

Can you decipher the below rebus?

PBLUESAISNUERSES