Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

Which wheel of car does not rotate when you turn your car right?

Can you identify if it's a murder or a suicide ?

I am a five-letter word under you,
Remove the first letter and I am above you,
Remove the second as well and I am around you.

Who am I?

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?