Quantitative Aptitude - Arithmetic Ability Questions

If cot A = n/(n + 1) and cot B = 1/(2n + 1), then what is the value of cot (A + B)?

If p/q = (x+3)/(x-3), then what is the value of p2+q2p2-q2 ?

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

The area of a circle is 616 sq cm, find its circumference?

If a+b=2c then the value of aa-c+cb-c is equal to (where a≠b≠c)

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

What is (x-y)3+y-23+z-x33x-yy-zz-x =?

Flight A usually takes 1 hour more than Flight B to travel a distance of 7200 km. Due to engine trouble speed of flight B falls by a factor of 1/6th, so it takes 36 minutes more than Flight A to complete the same journey? What is the speed of Flight A (in km/hr)?