What is the Surname of Barbie Doll?

Decode below rebus
D
N
A
T
S , D

Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?

There's a day, that comes around once a year.
To celebrate the man, you hold dear.
He gave you life, love and will pick you up if you fall.
When it comes to guys like him, He's the best of all.
Who is he?

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

What does the below rebus riddle means?

What number should come in place of the question mark below?

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

Can you count the number of squares in the figure below?