What's the only room from which no one can enter or leave

There is a box. The area of its top is 240 square units, the area of the front is 300 square units and the area of the end is 180 square units.

Can you calculate the dimensions of this box with the given data?

Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?

A spaceship was lost. The detective was given a piece of paper. This was the location of the spaceship! This is what the slip had scribbled on it:
Juice, Umbrella, Potato, Ice, Tomato, Elephant, Rice.

Where is the spaceship?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Count the number of triangles in the picture below:

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

How can a man go eight days without sleep?

What Deficiency does the below rebus represent?

VIT_MIN

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain