Can you solve the below tricky visual equation?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

After undergoing a successful eye operation, A blind girl has just boarded a train to her home. The doctor asked her to open the bandages after 3 hours. On her train journey, she opened the bandages and within a fraction of the time she commits suicide by jumping off the train.

Though her operation was successful, Why did she commit suicide?

Four cars come to a four-way stop, each coming from a different direction. They can’t decide who got there first, so they all go forward at the same time. All 4 cars go, but none crash into each other. How is this possible?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

What can go up a chimney down, but can’t go down a chimney up?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?