Quantitative Aptitude - Arithmetic Ability Questions

In the following question, select the odd letter from the given alternatives.

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

In the following question, select the odd word from the given alternatives.

If cosθ = x2-y2x2+y2, then the value of cotθ is

If x + 1x = 3, then x18 + x12 + x6 + 1 value is

A root of equation ax2 + bx + c = 0 (where a, b and c are rational numbers) is 5 + 3√3. What is the value of (a2 + b2 + c2)/(a + b + c)?

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

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