I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

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

I’m tall when I’m young, and I’m short when I’m old. What am I?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

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

During which month do people sleep the least?

O_er_t_o_

Complete the missing letters of the given word.

I make two people out of one. What am I?

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

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?