If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Christina is older than Kareena and Karishma. Katrina is older than Karishma and younger than Kareena. If Kareena has a brother named John, who is older than Christina, who's the youngest?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

What do you answer even though it never asks you questions?

Alex opened 24 presents
Jonah opened 8 presents
Clara opened 1 present

Can you find out how many presents were opened by Candy?

I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

What word is represented by this rebus?

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

Why do you find that most of the buildings are deprived of the 13th floor?