Quantitative Aptitude - Arithmetic Ability Questions

When a discount of 20% is given on a pizza, the profit is 32%. If the discount is 18%, then the profit is

Shiv sold a shirt for Rs. 184 at a loss of 8%. To make a profit of 5% he should have sold the shirt for

P and Q invested some money in a business in the ratio of 4 : 7 respectively. After 6 months P withdraws his capital. If they receive profits in the ratio of 4 :21, then for how many months did Q invest in the business?

In a computer game, there are builders and destroyers. Together there are 20 of them. Some of them try to build a wall around a castle while the rest try to demolish it. Each of the builders can build the wall alone in 15 hours while any of the destroyers can demolish it in 10 hours. If all 20 builders and destroyers are made active when there is no wall and the wall gets built in 3 hours, how many of them are destroyers?

If the mean of m observations out of n observations is n and the mean of remaining observations is m, then what is the mean of all n observations?

If 1 shirt is offered free on purchase of 4 shirts, what is the effective discount (in %) on each shirt?

Priya’s age was cube of an integral number (different from 1) four years ago and square of an integral number after four years. How long should she wait so that her age becomes square of a number in the previous year and cube of a number in the next year?

In a bucket, paint and oil are in the ratio 7 : 5. 24 litres of mixture is drawn off and 24 litres of oil is added. If the ratio of paint and oil becomes 1 : 1, then how many litres of paint was contained in the bucket initially?