If x% of $${25\over 2}\%$$ is 150, then the value of x is : 

A train covers 400 m distance in 24 sec. Its speed is-

Two people A and B started their journey from P to Q and Q to P respectively. After crossing each other, A and B completed the remaining part of their journey in 3 hour 20 mins and 4 hours 48 mins respectively. If the speed of B is 80 km/hr, then find the speed of A in (km/ hr)? 

Study the given pie chart and answer the question that follows.
Distribution (Degree wise) of students studying in schools A, B, C, D and E
Total Number of students =9000

The number of students in School E exceeds the total number of students in school A and B by x, where x lies between:

The value $${7+3\sqrt {5}\over3+\sqrt { 5}}-{7-3\sqrt {5}\over3-\sqrt { 5}}$$ lies between

A person divided a certain sum between his three sons in the ratio 3:4: 5. Had he divided the sum in $${1\over 3}:{1\over 4}:{1\over 5}$$ the ratio: the son, who got the least share earlier, would have got ₹1,188 more. The sum (in) was:

$$ {{2^n+2^{n-1}}\over {2^{n+1} -2^n}}=?$$

If the purchase price of an article is equal to 80 percent of its selling price then there will be profit.