There are forty elephants and they have forty-fore heads. How can this be possible?

Two brothers were watching a horror film on video late one night. One brother dozed off and dreamed that he was being chased by the crazy man from the movie, who was trying to kill him. In the dream, he hid in a cupboard. There was no sound except his heart pounding, and he had no idea where his crazed captor was. He was terrified! At that moment, the video finished, and his brother put his hand on the shoulder of his sleeping sibling to wake him. The shock at that tense moment was enough that the sleeping brother suffered a massive heart attack and died instantly. True or false?

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.

Who is that with a neck and no head, two arms and no hands? What is it?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

Which number should replace the question mark?

Which is the smallest number that you can write using all the vowels exactly once?