Prove that twice of ten is the same as twice of eleven.

Speaking of rivers, a man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?

A man is lying dead in a field where no one is around. His head is split open and his legs are disfigured. Near to him, there is an unopened package. No living organism can be found anywhere at the crime scene.

How did he die?

Spot 5 differences in two Christmas tree below:

I have teeth but i don't bite. Who Am I ?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

A prisoner is told: "If you tell a lie, we will hang you and if you tell the truth, we will shoot you." What did the prisoner say to save himself?

Which alphabet letter is a question?

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