Quantitative Aptitude - Arithmetic Ability Questions

What is (x-y)3+y-23+z-x33x-yy-zz-x =?

If a+b=2c then the value of aa-c+cb-c is equal to (where a≠b≠c)

The original price of a TV set is Rs. 6,000. If the price is discounted by 20% and then raised by 10% for service contract, the price charged by the shopkeeper is

A and B together can complete a piece of work in 12 days. They worked together for 5 days and then A alone finished the rest work in 14 days. A alone can complete the work in _____.

If A, B and C can do a job working alone in 12, 18 and 36 days respectively. They all work together for 2 day, then B quits. How many days will A and C take to finish rest of the job?

The average weight of 25 candles is 40 grams. If some candles of weight 50 grams each were removed, then average weight becomes 37.5 grams. How many candles of weight 50 grams each were removed? 

What will be the net discount percentage of three successive discounts of 20%, 10% and 30%?

When a number is increased by 120, it becomes 130% of itself. What is the number?