I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

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

Solve this riddle by finding the odd one out from the rest.

The teacher told the student that if he told a lie then he will be expelled from school and if he told the truth then he still is expelled from school.

What can a student say to prevent his being expelled from school?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

John is looking at Jenifer, but Jenifer is looking at Jacob. John is married, but Jacob is not.

Is a married person looking at an unmarried person ?

If 2 workers can complete painting 2 walls in exactly 2 hours.

How many workers would be needed to paint 18 walls in 6 hours?

Why do Chinese men eat more rice than Japanese men do ?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?