How can you take 2 from 5 and leave 4?

Why is the Hole below a Lock?

What word begins and ends with an E, but has only one letter?

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

There is so small cabin inside a deep forest.
All the forest burned out to worst possible but the inside of the cabin is still the same.
However all the person inside the cabin die.

How come ?

What word is represented by this rebus?

What you cannot hold but it is yours?

What jumps when it walks and sits when it stands?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

0 0 0 = 6
1 1 1 = 6
2 2 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

You can use any mathematical symbols in the space provided to make all above algebraic expressions true.