Quantitative Aptitude - Arithmetic Ability Questions

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

If the amount received at the end of 2nd and 3rd year at Compound Interest on a certain Principal is Rs 29160, and Rs 31492.8 respectively, what is the rate of interest?

What is the value of cot210°?

If x + y + z = 0, then what is the value of (3y2 + x2 + z2 )/(2y2 – xz)?

Expand and simplify (x + 5)2 + (x - 3)2

The number of solutions of the pair of linear equations x + 2y - 8 = 0 and 2x + 4y = 16 is

A train of length, 245 metres, takes 20 seconds to cross a 355 metres long bridge. How much time (in seconds) will the train take to cross a 390 metres long platform?

If 2+x+2-x2+x-2-x=2,then the value of X is