Why do we preferably have round manhole covers and not square ones?

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

When is the top of a mountain similar to a savings account?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Our product and our sum always give the same answer. Who are we?

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

To tease, King Akbar told his most clever advisor Birbal to give his daughter one thing that she can eat when hungry, drink if she feels thirsty and can burn if she feels cold. King Akbar was shocked when Birbal gave Akbar's daughter one such thing that satisfies all of the above.

What did Birbal give to Akbar's daughter?

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?

A new clothing store has a unique method of pricing items. A vest costs $20, a tie costs $15, a blouse costs $30, and underwear costs $45. How much would pants cost?

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?