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

The sum 9 + 16 + 25 + 36 +_______+ 100 is equal to?

If the number x3339 is divisible by 11, what is the face value of x?

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

Which of the following is the largest fraction   $${6\over7},{5\over6},{7\over8},{4\over5} ?$$ 

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

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