Quantitative Aptitude - Arithmetic Ability Questions

If x1/4 + x-1/4 = 2, then what is the value of x81 + (1/x81)?

A Rs 100 shirt is offered at 10% discount and a Rs 300 pair of trousers at 20% discount. If Pritam bought 1 shirt and 3 pairs of trousers, what is the effective discount (in %) he got?

Select the odd word from the given alternatives.

By selling an item for Rs. 696 Unnati incurred a loss of 13%. By how much should she have raised the price to gain a profit of 10%?

What is the average of all numbers between 11 and 80 which are divisible by 6?

What is the effective discount on two successive discounts of 20% and 25%?

If cot2A = x, then x is

The area of a circle is 616 cm². What is its circumference (in cm).