How many words can a pen with half refill write?

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

O T T F F S S ?

Can you find the hidden animal in the picture below?

Why do you find that most of the buildings are deprived of the 13th floor?

Five teams were competing in cricket where they faced each other exactly once. After the tournament, the following is the point table.

DareDevils 6
SuperKings 5
Royals 4
Sunrisers 2
Riders ?

How many points did Riders end up with?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

There were three women in all the swimming costumes!
One was happy and the other two were sad!
The happy one was crying and the sad ones were smiling.
Why was this?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Can you Find and name the hidden bird in the picture below ?