Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

How many words can a pen with half refill write?

What can jump higher than a building?

Can you solve this picture maths equation?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different. How do you measure 45 minutes?

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

Can you identify the hidden rebus in the image below?

What does the below image rebus riddle means ?