Quantitative Aptitude - Arithmetic Ability Questions

What is the value of |3(1) - 6|?

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

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?

The number of diagonals in a pentadecagon is

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.

25 - 1/2{5 + 4 - (3 + 2 - 1 + 3)} = ?

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

The lengths of the two diagonals of a rhombus are 6 cm and 8 cm. Find the length of its perimeter (in cm).