What is the fastest way to double your money?

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

Astrology starts with the alphabet A, Biology starts with B, Psychology with P and Limnology with L.

Can you find an "ology" that begins with a P?

Rearrange the letters in "new door" to make one word.

Shyla was sleeping in her apartment when suddenly a robber broke into her house. He asked her to stay quiet and started looting the cash and jewelry. Suddenly the landline phone started ringing. The robber pointed a gun at Shyla and asked her to pick up and talk without giving away the situation.

She picked up the phone and it happened to be her husband. She spoke, Is it an emergency darling? Do give me a call when your flight lands, I will prepare your favorite food that will help you relieve the stress. Then she hanged up.

10 minutes after, the police arrive at the scene and catch the robber. How did the police know about the robbery?

what does the below rebus mean?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

Why is it very easy to weigh a fish?

What does this mathematical rebus means ?