What always comes into a house through the keyhole?

Tell me the Hindi name of a Vegetable which if we remove 1st word will become a precious Stone and by removing the last word it will become a sweet eatable.

What am I?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

what's the probability of getting a king or a queen from a pack of 52 cards?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

What is the riddle which can be asked all day with a different correct answer each time.