Can you place six X (crosses) in below board without making three in a row in any way ?

Here is a conversation between a couple who both are software professionals.

Husband: Hey! What is your date of birth?
Wife Replied Angrily: It is 591062400
Husband after doing some calculations replied, "Got It".

What is the DOB of the wife?

Look at the picture and find out which square is not linked with any of the other squares.

John is selling fruits.
He sells grapes at $30, Dates $25, and a Wolfberry $45.
At what price does he sell fig?

PS: Logical Thinking

Why do Chinese men eat more rice than Japanese men do ?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

Today is a very icy and cold morning in Newcastle. Mr Shearer, an office bus driver arrived to pick up the employees from the last stop. Shearer suddenly remembers that he needs to pick a newly joined 4miles to the north. Mr Shearer lost his direction compass, a few minutes later Shearer is able to figure that he is moving in the correct direction i.e. north. How did Shearer know that he is moving in the correct direction?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

How can you take 2 from 5 and leave 4?

What does below rebus means ?