There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

If,

A = 1

B = 2

C = 3

...

...

Z = 26.

Based on above rule, you need to find an eleven letter word whose letter sum is equal to 52.

During which month do people sleep the least?

Whats the next number in the below number sequence pattern.

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?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?