What is the Surname of Barbie Doll?

If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

A man dies of old age on his 25 birthday. How is this possible?

I have feet, but no legs. Which animal Am I?

Can you find the key in the picture below?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

At the local model boat club, four friends were talking about their boats.

There were a total of eight boats, two in each colour, red, green, blue and yellow. Each friend owned two boats. No friend had two boats of the same colour.

Alan didn't have a yellow boat. Brian didn't have a red boat but did have a green one. One of the friends had a yellow boat and a blue boat and another friend had a green boat and a blue boat. Charles had a yellow boat. Darren had a blue boat, but didn't have a green one.

Can you work out which friend had which coloured boats?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?