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 on 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 options.

Which of the following is TRUE?

The angle of elevation of the top of a hill at the foot of the tower is 60 deg and the angle of elevation of the top of the tower from the foot of the hill is 30 deg. If the tower is 50 m high, what is the height of the hill?

If -3[1-(x/2)] + 5x/3 = 1/6, then what is the value of x?

If a person bought an item for Rs. 96 and sold it at a profit of 12.5%, the selling price of the item was

A sum of money of Rs. 1000 is lent out in two parts in such a way that the interest on one part at 10% per annum for 5 years is equal to another at 5% for 10 years. Calculate the sum lent out at 5%.

If PA and PB are tangents to the circle with centre O such that ∠APB=50°, then the ∠OAB=

If x+3y=-3x+y, then x22y2 is equal to