What is the Surname of Barbie Doll?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What colour are the stairs?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

It begins where the time ends.
Its second is an expression of surprise.
Its third is a question.
Its fourth is urinate.
It ends with a drink.

Which country it is?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

Can you solve the photo plexer logic ?