Quantitative Aptitude - Arithmetic Ability Questions

A = (x8 – 1)/(x4 + 1) and B = (y4 – 1)/(y2 + 1). If x = 2 and y = 9, then what is the value ofA2 + 2AB + AB2?

Marked price of an item is Rs 900. On purchase of 2 items discount is 16%, on purchase of 5 items discount is 44%. Raksha buys 7 items, what is the effective discount?

26% of a number is 65. What is the number?

Praneet started his journey at 2:45:46 p.m. and reached the destination at 4:55:57 p.m. Anit started the journey 58 mins 40 secs after Praneet and reached his destination 50 mins 29 secs after him. How long did Anit take to complete his journey?

Slit 69 into three parts such that they are in A.P. and the product of their smaller parts is 483.

How much does one need to add to 2/3 to obtain 3/2?

If an equilateral triangle has side 12 cm, then what is the difference (in cm) between the circumradius and inradius?

ABC is a right angled triangle with angle A = 90 deg. Then the value of cos2A+cos2B+cos2C is