Quantitative Aptitude - Arithmetic Ability Questions

What is the value of √[(1 ­- cosA)/(1 + cosA)]?

The sum of 4x + 3y ­ 7z, x ­ y ­ z and ­2x ­ 3y + 4z is

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

In ∆ ABC, the height CD intersects AB at D. The midpoints of AB and BC are P and Q respectively. If AD = 8 cm and CD = 6 cm, then the length of PQ is?

A, B and C can do a job working alone in 6, 9 and 18 days respectively. They all work together for 1 day, then A and B quit. How many days C working alone will take to complete the remainder of the job?

Mother can bake 20 cakes in 4 hours, Mother and Dadima together can bake 60 cakes in 10 hours. How many cakes Dadima can bake in 30 hours?

A mason can build a wall in 18 hours. After 9 hours he takes a break. What fraction of the wall is yet to be built?

The average height of 50 bats is 126 cm. Some bats of average height 120 cm are removed. If the new average height is 130 cm, then how many bats are remaining?