Quantitative Aptitude - Arithmetic Ability Questions

If a -­ b = 3 and ab =28, then a3 - b3 is

If the value 5 = 2.236,then calculate the value of 405 - 1280-125

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

If 2x-12x = 5, then what is the value x2 + 116x2 - 2

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.

If 16% of an electricity bill is deducted, Rs 1806 is still to be paid. How much was the bill?

In these questions, a question is given followed by information in three statements. You have to consider the information in all the three statements and decide the information in which of the statement(s) is not necessarily required to answer the question and therefore can be dispensed with. Indicate your answer accordingly How many students from institute 'A' got placement?

I. Number of students studying in institutes A and B are in the ratio of 3:4 respectively.

II. Number of students who got placement from institute B is 120% of the number of students who got placement from institute A

III. 80% of the students studying in institute B got placement.

If X=32, then the value of 27x3-54x2+36x-11 is