It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

I look at you, you look at me, I raise my right, you raise your left. What am I?

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?

In the figure that has been attached to this question, each digit represents a digit. The similar letters carry the same integer value. Can you expose the original digits?

What is the fastest way to double your money?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

What is the next number in this matchsticks series riddle?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

I am written with two letters.
I said with the one.
I usually am seen with the two.

Who am I?