Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

If your uncle’s sister is not your aunt, what relation is she to you?

What do you get if you add 2 to 100 four times?

There are three houses in a straight row. One is red, one is blue, and one is white. The red house is left of the middle. The blue house is right of the middle. Where's the white house?

How can you take 2 from 5 and leave 4?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Find the missing number in the series below

13 -21 34 -55 ? -144

When 99 is considered higher than 100?

A man is approaching a broad and barren land. He has a package with him. If somehow, he is unable to open the package before reaching the land, he will die.

Can you guess what is present in the package?

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.