Quantitative Aptitude - Arithmetic Ability Questions

If angles M and N measure 60 deg and 30 deg respectively, (sinM) x (cotN) = ?

 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.

Identified the odd one from the list below.

If 60 boys can finish a work in 15 days by working 8 hours a day, then how many hours a day should 72 boys work to finish that work within 20 days?

Find the in-radius (in cm) of an equilateral triangle whose sides are 6 cm each.

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.

Given w = -2, x = 3, y = 0 & z = -1/2. Find the value of (z/w) + x.

In ΔPQR measure of angle Q is 90 deg. If cotP = 8/15, and PQ = 4cm, then what is the length (in cm) of side PR?