13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

It belongs to you, but other people use it more than you do. What is it?

Can you write down eight eights so that they add up to one thousand?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?

Which wheel of car does not rotate when you turn your car right?

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

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?