What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Can you count the number of triangles inside a triangle?

Bopanna was working on a murder case when he received a message about the location of the murder weapon.
The message was encrypted as below.

"deb mitciv eht edisni neddih si nopaew redrum ehT"

Tell me the location of the murder weapon.

I am sure no one can have two things for dinner. what are they?

Can You Find The Poor LOST PUPPY Hidden In The Park in 20 Seconds?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

Which point will the car reach to go out?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

Intelligence Agency need to break the vault but the problem is that they are not able to break the vault.

On the vault, a text is written as:

31 11 33 33 43 45
21 25
31 24 11 31 51 41

To Break the code Intelligence Agency brings a mathematician named Joseph.
Minutes later he deciphers the code.

Whats the code?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?