Quantitative Aptitude - Arithmetic Ability Questions

P and Q can do a project in 20 and 12 days respectively. In how many days can they complete 40% of the project if they work together?

In ∆ABC, ∡A + ∡B = 75 and ∡B + ∡C = 140, then ∡B =

Average of the marks of 132 students of a college is 40. If the average of the marks of the passed students is 42 and the average of the marks of the failed students is 20, then what will be the respective ratio of the total marks of passed students and the total marks of failed students?

What is the value of (cot60 + 1/√3) ?

PQRA is a rectangle, AP = 22 cm, PQ = 8 cm. ΔABC is a triangle whose vertices lie on the sides of PQRA such that BQ = 2 cm and QC = 16 cm .Then the length of the line joining the mid points of the sides AB and BC is

What should be added to 3(x­ - 2y) to obtain 2(3x + y) -­ 5(2x + 3)?

The sum of 2xy(3x + 4y - 5z) and 5yz(2x - 3y) is

The marked price of a pen is Rs 3000. The shopkeeper gives two successive discounts of 15% and a% to the customer. If the customer pays Rs 2142 for the pen, then what is the value (in percentage) of a?