Quantitative Aptitude - Arithmetic Ability Questions

The 2nd and 6th term of an arithmetic progression are 8 and 20 respectively. What is the 20th term?

If x = 11, the value of x5 - 12x4 + 12x3 - 12x2 + 12x - 1 is

Select the related word/letters/number from the given alternatives.
1 : 8 :: ? :64

In the following question, select the odd letter/letters from the given alternatives.

In the last financial year, a car company sold 41,800 cars . In this year, the target is to sell 51,300 cars . By what percent must the sale be increased ?

If 7/8th of 5/4th of a number is 315, then 5/9th of that number is _____

If x1x2x3 = 4(4 + x1 + x2 + x3 ), then what is the value of [1/(2 + x1 )] + [1/(2 + x2 )] + [1/(2 + x3 )]?

Factorise x2 + 3x -­ 18