If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

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.

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

John was piloting a plane behind a car but was never able to overtake it. Why?