Quantitative Aptitude - Arithmetic Ability Questions

Working 7 hours in a day, 4 men can do a piece of work in 8 days. Working 8 hours in a day, the required number of men to perform the same work in 4 days will be

A water tank is 2/5 th full. Inlet A can fill the tank in 12 minutes while an outlet pipe B can empty it in 6minutes. If both the pipes are open, how long will it take to empty or fill the tank completely?

What is the reflection of the point (5, 3) in the line y = -2?

The value of (sec245 - cot245) - (sin230 + sin260) is

A's income is 25% more than B's income. B's income is what percent of A's income?

If A is equal to 20% of B and B is equal to 25% of C; then what percent of C is equal to A?

If a2b+c=b2c+a=c2a+b=1 then the value of 21+a+21+b+21+c

In triangle ABC, AB = 8 cm, angle A is bisected internally to intersect BC at D. BD = 6 cm and DC = 7.5 cm. What is the length of CA?