Quantitative Aptitude - Arithmetic Ability Questions

If a2sec2x - b2tan2x = c2 then the value of sec2x + tan2x is equal to (assume b2 ≠ a2 )

The list price (marked price ) of an article is Rs. 900 and is available at two successive discounts of 20% and 10% ; the selling price of the article,in rupees, is

What is the fourth proportional to 72, 168 and 150?

If 4x - 5(2x - 1) > 2x + 3 > 2 - 3x; then x can take which of the following values?

Select the odd word/letters/number/number pair from the given alternatives.

If a - b = 1 and ab = 6, then what is the value of a3- b3?

Krishna cycled a distance of 90 km at a certain speed. If he cycled 3 km slower every hour, he would have taken 5 more hours to reach his destination. What is the speed in kmph at which Krishna actually cycled?

In a class there were 28 boys and some girls. In a test the mean score obtained by the boys was 12.5 while that obtained by the girls was 14.5. If the overall average was 13.1, what was the total number of students in the class?