Quantitative Aptitude - Arithmetic Ability Questions

Find the odd word/letters/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 aLogic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

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

If 3:27 :: 5:?

38% of 250 is equal to

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

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

The radius of a hemisphere is 21 cm, what is its volume? (Take π = 22/7)