Quantitative Aptitude - Arithmetic Ability Questions

The ratio of the number of marbles that Pulak and Menaja had was 5:9 while the ratio of the number of marbles that Jairam and Menaja had was 7:18. What is the ratio of the number of marbles that Pulak and Jairam had?

A number is decreased by 10% and the resulting number is again decreased by 20%. What is the final percentage of decrease?

A student multiplied a number by 6/7 instead of 7/6. What is the percentage error in the calculation?

(242699 + 167109) ÷ (9946 –9446) = ?

What is the remainder, when 4x4 +10x3-20x2+90 is divided by (x+2) ?

A, B and C invest in a business in the ratio 3 : 6 : 5. A and C are working partners. Only B is a sleeping partner hence his share will be 3/4th of what it would have been if he were a working partner. If they make Rs 50,000 profit, half of which is reinvested in the business and the other half is distributed between the partners, then how much does C get (in Rs)?

An electric pump can fill a tank in 2 hours. Because of a leak in the tank, it was taking 21⁄2 hours to fill the tank. The leak can drain all the water off the tank in how many hours?

P can make a table in 16 days while Q can make it in 20 days. Q started the work and did that work for 5 days. In how many days P can complete the remaining work?