Quantitative Aptitude - Arithmetic Ability Questions

In a class of 50 students there are 22 girls who scored an average of 35 marks in the test. What is the average marks of the boys if the class average is 42 marks?

P and Q can do a project in 150 and 100 days respectively. In how many days can they complete 60% of the project if they work together?

If N = 0.369369369369... and M = 0.531531531531..., then what is the value of (1/N) + (1/M)?

What is the value of cot 5π/3?

In the question given below, two equations are provided. Solve the equations and establish the relationship between x and y

$$\begin{gathered} I. 2x2-13x-189=0 \\ II. 2y2-3y-189=0 \end{gathered}$$

A shopkeeper marks up his wares by 125% and offers 25% discount. What will be the selling price if the cost price (in Rs) is Rs 640?

In ∆XYZ measure of angle Y is 90 deg. If cosecX = 13/12, and XY = 1cm, then what is the length ( in cm ) of side YZ?

Find out the odd word/letters/number/number pair from the given alternatives.