Quantitative Aptitude - Arithmetic Ability Questions

If the successive discounts be 20% , 10% and 5% , then the single equivalent rate of discount is

The value of x13+x-13x23-1+x-23

At 30% discount the selling price of an article is Rs 1050. What is the selling price (in Rs) if the discount is 15%?

In a mixture, ink and water are in the ratio of 8 : 5. If 24 litres of water is added to the mixture, then the new ratio becomes 8 : 11. What is the total quantity (in litres) of water in the new mixture?

The average marks in science subject of a class of 20 students is 68. If the marks of two students were misread as 48 and 65 of the actual marks 72 and 61 respectively, then what would be the correct average?

The average of four consecutive odd numbers is 64. What is the value of largest number?

Two pipes X and Y can fill an empty tank in 16 hours and 20 hours respectively. Pipe Z alone can empty the completely filled tank in 25 hours. Firstly both pipes X and Y are opened and after 6 hours pipe Z is also opened. What will be the total time (in hours) taken to completely fill the tank?

A work can be completed by 28 women in 36 days. If 4 women leave after working for 18 days, then how many days will be needed to complete the remaining work?