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

I travel all around the world but always stay in the corner. What am I?

If your uncle’s sister is not your aunt, what relation is she to you?

1. How can we put an elephant in the refrigerator?
2. How can we put a Giraffe in a refrigerator?
3. The king of the jungle invites all the animals to a party everyone comes except for one animal, which animal?
4. You come to a crocodile-infested lake, you can't go around it, you can't co under it and you can't go over it, how do you get across?

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

Which is heavier: a ton of bricks or a ton of feathers?

Decode below rebus
D
N
A
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Which country gets ill every time?

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

Why do we preferably have round manhole covers and not square ones?