What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?

What occurs twice in a week, once in a year but never in a day?

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?

What does the below rebus riddle means?

What kind of tree can you carry in your hand?

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

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

why number 8549176320 is one of a kind?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?