If it took eight men ten hours to build a wall, how long would it take four men to build it?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

The captain of a ship was telling this interesting story: "We travelled the sea far and wide. At one time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly." How can that be possible?

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

If,

A = 1

B = 2

C = 3

...

...

Z = 26.

Based on above rule, you need to find an eleven letter word whose letter sum is equal to 52.

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?