When a number is increased by 28, it becomes 107% of itself. What is the number?

In a two digit number if it is known that its unit digit exceeds its tens digit by 2 and that the product of the given number and the sum of its digits is equal to 144, then the number is 

What will be remainder if (13)³ is subtracted from (66)² ?

The number of pairs of natural numbers the difference of whose squares is 45 will be –

The zeros of the cubic polynomial $$ {2x^{3}-x^{2}-2x+1}$$ are a, b and c respectively. Find ab + bc + ca =?

The third proportional of two numbers 9 and  24 is

What should be added at least in 1140 so that it becomes a perfect square?

What value will come in place of question mark (?) in the questions given below?
6⁹ × 36 ÷ 7776 = 6^? ÷ 216