Direction : What should come in place of the question (?) in the following question.

$$3{5\over7}× 4{5\over6} + ? =23{3\over4}$$

If 2A = 3B = 7C = 42, then what is the value of A × B ÷ C?

A number whose one - fifth part increased by 4 is equal to its one - fourth part diminished by 10 is: 

If the 5 digit number 538xy is divisible by 3, 7 and 11, then the value of (x² +y²)  is:

A certain number when divided by 175 leaves a remainder 132. When the same number is divided by 25, the remainder is:

Find the mean of first Five Prime Numbers.

All 32 students in a class are standing in a row facing north. Akash is 12th from the right end while Priya is 18th from the left end. How many people are standing between Akash and Priya?

1332.89+171.928+17.01 +?²=1690.87