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

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

What have one eye but still cannot see?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

Which Burger Is Different in below image?

How can you take 2 from 5 and leave 4?

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?