Manoj and Sachin are ranked seventh and eleventh respectively from the top in a class of $31$ students. What will be their respective ranks from the bottom in the class?

Which two months in a year have the same calendar?

How many numbers from $1$ to $100$ are there,each of which is not only exactly divisible by $4$ but also has $4$ as a digit?

How many $6$s are there in the following number sequence which are immediately preceded by $9$ but not immediately followed by $4$? $5, 6, 4, 3, 2, 9, 6, 3, 1, 6, 4, 9, 6, 4, 2, 1, 5, 9, 6, 7, 2, 1, 4, 7, 4, 9, 6, 4, 2$

How many numbers from $11$ to $50$ are there which are exactly divisible by $7$ but not by $3$?

In a row of girls,Rita and Monika occupy the ninth place from the right end and tenth place from the left end,respectively. If they interchange their places,Rita and Monika occupy seventeenth place from the right and eighteenth place from the left,respectively. How many girls are there in the row?