Which Travels Faster? Solve below famous picture riddle:

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?

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?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

Why Aeroplane windows are round?

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

What is full of holes but still holds water?

You can see it everyday, But cannot touch it at will. What is it?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

What number divided by 4 is the same as that number minus 4?