If a wheel has 54 spokes, how many spaces are there between the spokes?

What is the next number in this matchsticks series riddle?

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

What goes through cities and fields, but never moves?

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

Our product and our sum always give the same answer. Who are we?

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.

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100