Quantitative Aptitude - Arithmetic Ability Questions

If x - y = -6 and x + y = 16, then x2- y2 is?

If Sec θ = 5/3, then what is the value of Cosec θ?

What is the value of 10% of 150% of 400?

If the selling price is Rs 855 after getting a discount of 5%, what was the marked price?

If 2secA - (1 + sinA)/cosA = x, then the value of x is

If the shopkeeper sells an item at Rs 4400 which is marked as Rs 5000, then what is the discount that he is offering?

The simplified form of (4x + 3)2 . (3x - 5) - (4x3 - 12x2 + 9x - 20) is

To travel 660 km, an Express train takes 10 hours more than Rajdhani. If however, the speed of the Express train is doubled, it takes 7 hours less than Rajdhani. The speed of Rajdhani is