20 men could complete a work in 80 days. They worked together for 60 days, after that due to bad whether the work is stopped for 10 days. How many more men should be employed so as to complete the work in time?

Sanjay sold an article by giving a discount of 8 % for Rs. 17940. And make a profit of 19.6 %. If he did not give discount then how profit percentage he get? 

To travel 432 km, an Express train takes 1 hour more than Duronto. If however, the speed of the Express train is increased by 50%, it takes 2 hours less than Duronto. What is the speed (in km / hr) of Duronto train? 

There are 3 green, 4 orange and 5 white color bulbs in a bag. If a bulb is picked at random, what is the probability of having either a green or a white bulb?

A certain sum becomes Rs 840 in 3 years and Rs 1200 in 7 years at simple interest. What is the value (in Rs) of principal? 

Direction: Study the double bar graph given below and answer the questions.

The ratio of the participants in exhibition of class IX with the total participants of class IX is:

X liters of milk is taken out and replaced with water from a container having 240 liters milk. Now, 20% of the mixture is taken out and replaced with water. In final mixture, the difference in quantity of milk & water is 128 liters. Find X.

The average weight of 14 children is 22 kg. If the weight of the teacher is also included, then the average weight becomes 23 kg. What is the teacher's weight?