These types of puzzles are known as charades. What you have to do is to find two words that are referred to in the first stanza and the second stanza and put them together to form the third word in the third stanza.

Just for example, if my first refers to 'off' and my second refers to 'ice', then my whole will be the 'office'.

My first is present - future's past -
A time in which your lot is cast.

My second is my first of space
Defining people's present place.

My whole describes a lack of site -
A place without length, breadth, or height.

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

Can you figure out the logic I used to decide the order of the following words:
gun, shoe, spree, door, hive, kicks, heaven, gate, line, den

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

People put me on the table and cut me but do not eat me. What am I?

In a basket of apples,
when counted in twos, there was one extra
when counted in threes, there were two extra when counted in fours, there were three extra
when counted in fives, there were four extra
when counted in sixes, there was five extra.

However, if the apples were counted in sevens, no extra apple was left. Can you calculate the minimum number of apples that were present in the basket?

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

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

I know a nine-letter word having only one vowel.
Do you ?