2, 3, 5, 9, 17, _ What is the next number in the sequence?

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

When it's bad luck to meet a black cat?

A king sentenced a man to the death sentence for some crime he had committed. Known for his kindness, the king told the culprit that he had a choice to die in a way he decides.

The culprit was clever and said something that saved him from death. What method do you think he must have chosen for his death?

Why did the Girl throw the butter out of the window?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

What does below chemistry rebus means?