Solve this riddle by finding the odd one out from the rest.

What does the below rebus riddle means?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

Which number should replace the question mark?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

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?

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.

Paul's height is six feet, he's an assistant at a butcher's shop and wears size 9 shoes. What does he weigh?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?