Can you name some countries which do not have the alphabet 'A' in them?

Can you count the number of triangles inside a triangle?

Can you count the number of triangles in the given picture?

Replace the question mark with the correct number in the below-given picture?

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.

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?