Quantitative Aptitude - Arithmetic Ability Questions

If (1 -­ cosA)/(1 + cosA) = x, then the value of x is

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

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

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

If secA = x, then the value of x is

What is the simplified value of tan (θ/2) + cot (θ/2)?

The greatest perfect square number of 6 digits is

Pipe A can empty a filled tank in 28 hours while Pipe B can fill the same tank, when empty in 35 hrs. If alternatively Pipes A and B are turned on for an hour each time, starting when the tank is full, how long will it take to empty the tank?