Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

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

Can you find out which number multiplied by itself will give the output as 12345678987654321?

Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3.

(You can use one number only once)

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

I am Huge on Sunday and Saturday.
I am small from Tuesday to Thursday.
I do not exist on Monday and Friday.
Who am I?

Akbar called Birbal and asked him to draw a line on the floor. He asked Birbal to make that line smaller without erasing it. Birbal smiled and did it before Akbar could blink his eyes.

How did he managed to do it?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?