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?

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

If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?

In the given picture, you can find two letters missing. When two particular letters are placed in the missing spots, you get an eight-letter word while reading in the anti-clockwise direction. Can you find out the missing letters and the missing word eventually?

Be active and find the killer in the picture Riddle below.

What is full of holes but still holds water?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

How can you take 2 from 5 and leave 4?