How is the moon similar to a dollar?

What is the coolest letter in the alphabet?

Can you start the fire using two pieces of wood?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

Which letter of the alphabet has the most water?

In the following picture, E is going to slide the object down and as per the terrain and the physics, the round object is going to travel all the way till the end. Now, can you analyze who all people will die when it happens?

What has many teeth, but cannot bite?

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?