Quantitative Aptitude - Arithmetic Ability Questions

A and B together do a job in 12 days and A could do the job in 20 days if he worked alone. How many days would B take to do the job if he worked alone?

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?

At 24% discount the selling price of a washing machine is Rs 38000, what is the selling price if the discount is 40%?

In the given series of numbers how many 7's are there which are immediately followed by 9 and immediately not preceeded by 5 ?

A total amount of Rs. 1560 is to be divided among A, B, C such that A gets 50% of what B gets and B gets 20% of what C gets. How much will B get ?

By selling 175 pineapples, the gain is equal to the selling price of 50 pineapples. What is the gain percentage?

What is the average of all numbers between 100 and 200 which are divisible by 13?

On selling 25 shirts, a retailer earns profit equal to the cost price of 8 shirts. What is the profit percentage?