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

O T T F F S S ?

A swan sits at the center of a perfectly circular lake. At an edge of the lake stands a ravenous monster waiting to devour the swan. The monster can not enter the water, but it will run around the circumference of the lake to try to catch the swan as soon as it reaches the shore. The monster moves at 4 times the speed of the swan, and it will always move in the direction along the shore that brings it closer to the swan the quickest. Both the swan and the the monster can change directions in an instant.
The swan knows that if it can reach the lake's shore without the monster right on top of it, it can instantly escape into the surrounding forest.

How can the swan successfully escape?

How could a baby fall out of a twenty-story building onto the ground and live?

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

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

The owner of a popular clothing store comes up with his own method of pricing items. A vest costs $8, socks cost $10, a tie costs $6, and a blouse costs $12. Using the owner’s method, how much would a pair of underwear cost?

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

Who is that with a neck and no head, two arms and no hands? What is it?

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

How many triangles can you find in this given picture?