How can you tell a raw egg from a hard-boiled egg?

The more you take me, the more you leave me behind.
Who Am I?

Can you count the number of lines in the below picture?

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. How many hens does the farmer need to produce one dozen eggs in six days?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

In the image below, can you find the value of an angle(y)

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?