Quantitative Aptitude - Arithmetic Ability Questions

In the following question, four number pairs are given. The number on left side of (–) is related to the number of the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

The ratio of salary of u, v and w is 8 : 7 : 13. If w gets Rs 3384 more than that of v, then what is the salary (in Rs) of u?

If sinθ x cosθ = 1⁄2 . The value of sinθ ­- cosθ is where 0°< θ< 90°

If cosec π/4 - ­ sin π/3 = x, then the value of x is

If sin ­-330° = x, then the value of x is

If 2pp2-2p+1 = 14, then the value of (p + 1/p) will be

If cos4θ-sin4θ=13 then the value of tan2θ is

The value of -3+3+87+43 is