What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

Prove that twice of ten is the same as twice of eleven.

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

How many triangles are there on the puzzle below?

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

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

I’m tall when I’m young, and I’m short when I’m old. What am I?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

How many times can you subtract the number 5 from 25?

A newspaper is supposed to have 60 pages, but pages 24 and 41 are missing.
Which other pages won't be there?