Why is 6 afraid of 7?

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

Which alphabet is a part of our body?

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

Do You See It?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?