Quantitative Aptitude - Arithmetic Ability Questions

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:

What percentage of 1 day is 18 minutes?

If x = a + 1a, y = a - 1a ,(a>0), then the value of x4+y4-2x2y2 is

Select the odd word/letters/number/number pair from the given alternatives.

In the following question, select the odd word pair from the given alternatives.

2sin[(C+D)/2].sin[(D­-C)/2] is equal to

If x2-3x+1=0, then x+1x is (x≠0)

ΔABC is similar to ΔPQR. Length of AB is 18 cm and length of the corresponding side PQ is 12 cm. If area of ΔABC is 324 sq cm, what is the area of ΔPQR?