Can you find the key in the picture below?

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?

What is 3/7 chicken, 2/3 cat and 2/4 goat?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

What is the centre of gravity?

What is full of holes but still holds water?

Can you count the number of blocks in the picture below?

What is so fragile that saying its name breaks it?

The owner of a popular clothing store comes up with his own method of pricing items. A vest costs $8, socks cost $10, a tie costs $6, and a blouse costs $12. Using the owner’s method, how much would a pair of underwear cost?

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?