Can you replace the question mark with the correct number?

Kareena is older than Katrina and younger than Karishma. Isabelle is younger than Bipasha and Karishma. Bipasha is older than Karishma. If Kareena and Isabelle are the same age, who's the youngest?

What Adam and Eve do not have but the rest of the people have?

I got a bee but no honey.
got an eye but am still blind.
got a sea but no water.
got a tea but no coffee.
got a why but no answer.

What Am I?

Can you solve the photo plexer logic ?

What does a man do only once in his lifetime, but women do once a year after they are 29?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

It belongs to you, but other people use it more than you do. What is it?

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?