What is in seasons, seconds, centuries and minutes but not in decades, years or days?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

There are three boxes of different sizes with three cupcakes inside each of the boxes in Christina's kitchen. At night her daughter wakes up and goes to the kitchen. She opens a box and eats all three cakes.

But in the morning Christina finds out that each box still had three cupcakes. How?

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 it be possible to build a house that has all its four walls facing towards the South?

Take away the whole and some still remain. What is it?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

From a pack of 52 cards, I placed 4 cards on the table.

I will give you 4 clues about the cards:

Clue 1: Card on left cannot be greater than the card on the right.
Clue 2: Difference between the 1st card and 3rd card is 8.
Clue 3: There is no card of an ace.
Clue 4: There are no face cards (queen, king, jacks).
Clue 5: Difference between the 2nd card and 4th card is 7.

Identify four cards?

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