Quantitative Aptitude - Arithmetic Ability Questions

If √(1+tan2A) = x, then the value of x is

The price of an article is discounted by 25%, to restore to its original value, the new price must be increased by

What is the equation of a line which has 3 as x-intercept and -5 as y-intercept?

The value of aa-b+bb-a is

A boat covers 143 km upstream in 13 hours and the same distance downstream in 11 hours. What is the speed (in km/hr) of the boat in still water?

If x = (√5) + 1 and y = (√5) – 1, then what is the value of (x2/y2) + (y2/x2) + 4[(x/y) + (y/x)] + 6?

Two whole numbers are such that the cube of first number exceeds the cube of second by 61 and the ratio of the numbers is 5:4. What is the value of larger number?

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.