What is the Surname of Barbie Doll?

What does below pictogram mean?

The following question it puts forth you:

25 - 55 + (85 + 65) = ?

Then, you are told that even though you might think it's wrong, the correct answer is actually 5!

Whats your reaction to it? How can this be true?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

Where do you go to learn how to make ice cream?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Replace the question mark with the number below given a simple math problem.

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

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

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?