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

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?

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

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

How can you take 2 from 5 and leave 4?

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

I am the fastest animal but cannot climb the tree. What am I?

What has many keys but can’t open a single lock?

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