Quantitative Aptitude - Arithmetic Ability Questions

If cot 240° = x, then the value of x is

What is the value of (tan60 + 1/3) ?

What is the value of sin (–π/3) + cos(–π/6)?

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

In the following question, four groups of three numbers are given. In each group the second and third number are related to the first number by a Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

(−12)[11+7×(−3)]÷{}[413−(−3)×(−6)]=

The price of a chair is Rs. 500. It has been sold at two succesive discounts of 10% each. What is its selling price?

Two trains are moving in opposite directions with the same speed. If the length of each train is 120 metres and they cross each other in 12 seconds, then what is the speed (in km/hr) of each train?