If $$  3 ^{2x-y}=3^{x+y}=\sqrt{27}$$ then the value of y is

If angle bisector of a triangle bisects the opposite side, then what type of triangle is it?

What is the value of $$ {\sqrt{625}+\sqrt{484}}$$

Directions:  Study the bar-graph given below & answer the questions.
Pie-chart given below shows the percentage distribution of total no. of boys in six different Schools.
Total Boys in all schools together = 6400

If total no. of students in school F is 820. Then girls in school F is approximately what percent more/less than total boys in school B?

Find the exact value of the following question:

$$ (13+2\sqrt{5})^2=?\sqrt{5}+189 $$

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

If ax - 4y = -6 has a slope of -3 / 2. What is the value of a? 

In how many years will be Rs. 2,000 amounts to Rs.2,420 at 10% per annum compound interest ?