Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

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

I am a number I am not an odd number I am higher than 90 I am not higher than 100 If you subtract me from 100, you get nothing. What number am I?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

What breaks yet never falls, and what falls yet never breaks?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

A thief is convicted in Mexico. He gets the death penalty. The judge allows him to say the last sentence to determine how the penalty will be carried out. If the thief lies, he will be hanged, if he speaks the truth he will be beheaded. The thief tells the last sentence and to everybody's surprise some minutes later he is set free because the judge cannot determine his penalty. What did the thief say?

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.