Quantitative Aptitude - Arithmetic Ability Questions

A can finish a work in 18 days and B in 36 days. If they work on it together for 9 days, then what percent of work is left?

When a discount of 20% is given on an African safari ticket, the profit is 43%. If the discount is 28%, then the profit is

In the given figure, O is centere of the circle. Circle has 3 tangents. If angle QPR = 45 deg, then what is the value (in deg) of angle QOR ?

If x+1x=5, then the value of 6xx2+x+1 is,

A merchant buys 25 litres of milk daily at the rate of Rs.12 per litre. He mixes 5 litres of water in it and sells at the rate Rs.10.40 per litre. His gain/loss is:

Pipes A and B can fill a cistern in 15 hours together. But ifthese pipes operate separately A takes 40 hours less than Bto fill the tank. In how many hours the pipe A will fill thecistern working alone?

Which of the following is the least of all?

Type 1 workers are 2.5 times as efficient as type 2 workers. Twelve Type 1 workers can complete a task in 10 days. How many days would it have taken 4 Type 1 and 15 Type 2 workers to do the same work?