I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

How many times can you subtract the number two from the number fifty?

A man started to town with a fox, a goose, and a sack of corn. He came to a stream which he had to cross in a tiny boat. He could only take one across at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How did he get them all safely over the stream?

Which is the correct shadow of the bird?

How many letters are in the alphabet?

I am white when I am dirty, and black when I am clean. What am I?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

Before Mount Everest was discovered, what was the highest mountain in the world?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?