The product of two positive numbers is 11520 and their quotient is $$9\over5$$.Find the difference of two numbers?

If difference of cube and square of a number is 100 and difference of square and number is 20, then value of number is 

The greatest number less than 1500, which is divisible by both 16 and 18, is:

Product of digits of a 2-digit number is 27. If we add  54 to the number, the new number obtained is a number formed by interchange of the digits. Find the number.

How many numbers are there from 500 to 650 (including both) which are neither divisible by 3 nor by 7?

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

8934 – 3257 + 481 = ? + 2578

What least value must be assigned to ‘*’ so that the number 63576 * 2 is divisible by 8?

The total cost of 18 pens and 23 pencils is Rs. 231, while the total cost of 7 pens and 13 pencils is Rs. 102. What is the cost of 4 pens and 9 pencils?