Quantitative Aptitude - Arithmetic Ability Questions

If x -­ y = ­7 and x + y = 13, then x2 - y2 is

What is the value of x4+y4 when the value of x3+y3=8 and x+y=2 ?

If 3.5x = 0.07y, then find the result of [y-x / y+x]

The list price of an article is Rs. 900. It is available at two successive discounts of 20% and 10% . The selling price of the article is:

The marked price of a pen is Rs 3000. The shopkeeper gives two successive discounts of 15% and a% to the customer. If the customer pays Rs 2142 for the pen, then what is the value (in percentage) of a?

A box of 20 items was bought for Rs. 6,400 after a discount of 20%. Find the cost of each item.

If the product of two numbers is 2522 and their LCM is 97 then their HCF is

What is the slope of the line 2x - 5y = 12?