I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

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

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

What does below Rebus say?

XLR8

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?