What happened when the wheel was invented?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

Decode the movie name from the below picture?

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

A wealthy man lives alone in a small cottage. Being partially handicapped he had everything delivered to his cottage. The mailman was delivering a letter one Thursday when he noticed that the front door was ajar. Through the opening he could see the man's body lying in a pool of dried blood. When a police officer arrived he surveyed the scene. On the porch were two bottles of warm milk, Monday's newspaper, a catalog, flyers, and unopened mail. The police officer suspects it was foul play. Who does he suspect and why?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

What demands an answer, but asks no questions

In the given picture, you can find two letters missing. When two particular letters are placed in the missing spots, you get an eight-letter word while reading in the anti-clockwise direction. Can you find out the missing letters and the missing word eventually?

It belongs to you, but other people use it more than you do. What is it?