Quantitative Aptitude - Arithmetic Ability Questions

P and Q can do a project in 12 and 12 days respectively. In how many days can they complete 50% of the project if they work together?

The average of 100 items was found to be 30 . If at the time of calculation , two items were wrongly taken as 32 and 12 instead of 23 and 11 , then the correct average is

The average weight of Shivshankar, Gopesh and Reena is 97 kg. If the average weight of Shivshankar and Gopesh is 93 kg and that of Gopesh and Reena is 82 kg, then the weight of Gopesh is

A sum of Rs 2000 becomes Rs 3645 in 2 years at a certain rate of compound interest. What will be the sum (in Rs) after 4 years?

The bar chart given shows the sales of 3 types of cars in the Indian automotive industry over 4 years. All the sales figures have been shown in terms of 000 units.

If all the 3 categories increase by same rate in 2013 over 2012 as they did in 2012 over 2011, then what will be the total approximate sales (in ‘000 units) of all the 3 categories taken together in year 2013?

In an army selection process, the ratio of selected to unselected candidates was 4:1. If 90 less had applied and 20 less selected, the ratio of selected to unselected would have been 5:1. How many candidates had applied for the process?

If (x – y) = 7, then what is the value of (x – 15)3 – (y – 8)3?

A fraction is greater than its reciprocal by 9/20. What is the fraction?