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.

For x > 0, what is the minimum value of  x + x+22x?

If 35% of A's income is equal to 25% of B's income, then the ratio of A's income to B's income is

A boy starts from his house and walks at a speed of 5 km/hr and reaches his school 3 minutes late. Next day he starts at the same time and increases hisspeed by 4 km/hr and reaches 3 minutes early. What is the distance (in km) between the school and his house?

In how many different ways can the letters of the word 'THERAPY' be arranged so that the vowels always come together?

If a = 2 , b = ­3 then the value of 27a3 - 54a2b + 36ab2 - 8b3 is

If sinC - sinD = x, then value of x is

In each question two equations numbered I and II are given,you haveto solve both the equation and choose the correctanswer.

$$\begin{gathered} I. 5x2+ 28x = -15 \\ II. 3y2+ 11y + 6 = 0 \end{gathered}$$