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

Which five letter word can be added at the end of below word to form a
valid word?

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Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

Can you Find and name the hidden bird in the picture below ?

There is a certain crime, that if it is attempted, is punishable, but if it is committed, is not punishable. What is the crime?

100 prisoners are stuck in the prison in solitary cells. The warden of the prison got bored one day and offered them a challenge. He will put one prisoner per day, selected at random (a prisoner can be selected more than once), into a special room with a light bulb and a switch which controls the bulb. No other prisoners can see or control the light bulb. The prisoner in the special room can either turn on the bulb, turn off the bulb or do nothing. On any day, the prisoners can stop this process and say "Every prisoner has been in the special room at least once". If that happens to be true, all the prisoners will be set free. If it is false, then all the prisoners will be executed. The prisoners are given some time to discuss and figure out a solution. How do they ensure they all go free?

Can you identify the hidden rebus in the image below?

Intelligence Agency need to break the vault but the problem is that they are not able to break the vault.

On the vault, a text is written as:

31 11 33 33 43 45
21 25
31 24 11 31 51 41

To Break the code Intelligence Agency brings a mathematician named Joseph.
Minutes later he deciphers the code.

Whats the code?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?