Quantitative Aptitude - Arithmetic Ability Questions

If 8/5 of 4/3 of a number is 192, then 5/6 of that number is

20% discount is offered on an item. By applying a promo code the customer wins 15% cash back. What is the effective discount?

If x -­ y = 7 and xy = 32, then value of (x2 + y2) is

If x + y = 13 and x2 + y2 = 89, then find xy is

If 1/3(12x/5 - 1/2) + 6/5 = 7/6, then what is the value of x?

If x - y = 6 and xy = 40, then find x2 + y2 ?

What is the value of cosec 3π/4?

In the following question, four number pairs are given. The number on left side of (–) is related to the number of the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.