I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

I travel all around the world but always stay in the corner. What am I?

What is both possible and impossible at the same time?

If two's company, and three's a crowd, then whats four and five ?

The centre of the third figure is empty. What digit should fit inside?

Rob is taller than Edwin, and Jurgen is shorter than Rob.
Of only one of the following statements, we now certainly know it is correct:

A.Edwin is taller than Jurgen
B.Jurgen is taller than Edwin
C.It cannot be determined if Jurgen or Edwin is the tallest.

How many triangles can you find in this given picture?

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

What does the below rebus riddle means?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?