How many times can you subtract the number two from the number fifty?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

I am white when I am dirty, and black when I am clean. What am I?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

There are two dice with empty faces in front of you and a marker. You can mark any number on each of the faces of the two dice, but you have to display all 31 days of the month using the two of them.

Which numbers will you mark on which dice so that you can easily depict all the dates of the month?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

Fate has decided that you will only be pleased to meet me when you need me

Maybe that is why, when I am working, I start working

However annoying I may be to the regulars, the little ones are always inspired

I will always be waiting if you try to reach me

How many of you can guess my name, let me see

This is a simple one. You just have to count the number of Fs in the given sentence.

Finished Files are the result of years of scientific study combined with the experience of years.

How many did you count?

Can you count the number of triangles in the given figure?

Next Number in the Series,

5, 16, 49, 104, ?