A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With help of C, they did the job in 4 days only. Then, C alone can do the job in:

A, B and C can do a piece of work in 20, 30 and 60 days respectively. In how many days can A do the work if he is assisted by B and C on every third day?

If 6 men and 8 boys can do a piece of work in 10 days while 26 men and 48 boys can do the same in 2 days, the time taken by 15 men and 20 boys in doing the same type of work will be:

A boy had a bike for  ₹ 32000 and was sold for ₹ 45000. What was the boy's profit? 

If CP=Rs. 80; SP=Rs.120 then find profit percentage.

If an object is bought for Rs.90 and then sold for a loss of 15%. How much was it sold for?

A person incurs a loss of 5% be selling a watch for Rs. 1140. At what price should the watch be sold to earn 5% profit.

A farmer buys 240 cows. He sells some of them at a gain of 20% and the remaining at a gain of 30%. If he gains 28% on the whole, then how many did he sell at a gain of 20%?

Find the ratio in which rice at Rs. 7.20 a kg be mixed with rice at Rs. 5.70 a kg to produce a mixture worth Rs. 6.30 a kg.

The cost of Type 1 rice is Rs. 15 per kg and Type 2 rice is Rs. 20 per kg. If both Type 1 and Type 2 are mixed in the ratio of 2 : 3, then the price per kg of the mixed variety of rice is (in Rs.):

A Jar contains 30 liters mixture of Milk and Water in the ratio of x:y respectively. When 10 liter of the mixture is taken out and replaced it water, then the ratio becomes 2:3. Then what is the initial quantity of Milk in the Jar?

The ratio of numbers of girls and boys participating in sports of a school is 4:5. If the number of girls is 153, determine the number of boys participating in the sports.

In an 8 round tennis tournament Petru wins 3, draws 1 and loses the rest. What is his ratio of wins : lose : draw ?

How many factors of 1080 are perfect squares?

How many zeros at the end of 1000! ?

A number D236D0 can be divided by 36 if D is

In a college of 300 students, every student reads 5 news paper and every news paper is read by 60 students. the number of the news paper is:

All the page numbers from a book are added, beginning at page 1. However, one page number was added twice by

mistake. The sum obtained was 1000. Which page number was added twice?

A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream.