Quantitative Aptitude - Arithmetic Ability Questions

A person driving at the speed of 40 kmph reaches office 1 minute early while he reaches 3 minutes late if driving at 36 kmph. What is the distance in km that she is covering?

A can do a work in 24 days and B in 40 days. If they work on it together for 10 days, then what fraction of work is left?

B is thrice as efficient as A and C is 0.75 times as efficient as A. What is the ratio of number of days taken by A, B and C when they work individually?

ΔXYZ is right angled at Y. If cosX = 3/5, then what is the value of cosecZ ?

What is the altitude of an equilateral triangle whose side is 12 cm?

If the value of √42 is approximately 6.480, then what is the approximate value of √(6/7)?

Find the value of x if 1-x24 = 1318

If u+v = 10 and uv = 16, then find the value of u2-v2uv