What 5-letter word typed in all capital letters can be read the same upside down?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Count the number of triangles in the picture below:

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

The cream is heavier than Milk. True or False?

I have eight fingers and two thumbs but I do not live. What Am I?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

what does this picture(rebus) riddle means ?