What word is pronounced the same if you take away four of its five letters?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?

I shave every day, but my beard stays the same. What am I?

Why Wine Glass Stem is so long?

What seven-letter word has hundreds of letters in it?

Through your logical capabilities, can you make 7 an even?

Mother's Name is Mrs. SIXTY TWO
Son's Name is FIFTY TWO
Daughter's Name is FORTY TWO
What is Name of Father?