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

If eleven plus two equals one, what does nine plus five equal?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

What breaks yet never falls, and what falls yet never breaks?

What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

Samuel was out for a walk when it started to rain. He did not have an umbrella and he wasn't wearing a hat. His clothes were soaked, yet not a single hair on his head got wet. How could this happen?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

The dirtier I get, the whiter I look. Who am I?