A hostel has 120 students and food supplies are for 45 days. If 30 more students come to that hostel, then in how many days will the food items be finished there?

In one glass, milk and water are mixed in the ratio 3:5 and in another glass they are mixed in the ratio 6:1.In what ratio should the content of the two glasses be mixed together so that new mixture contains milk and water in the ratio 1:1?

In a test, minimum passing percentage for girls and boys is 30% and 45% respectively. A boy scored 280 marks and failed by 80 marks. How many more marks did a girl require to pass in the test if she scored 108 marks?

A man goes downstream with a boat to some destination and returns upstream to his original place in 5 hours. If the speed of the boat in still water and the stream are 10 km/hr and 4 km/hr respectively, the distance of the destination from the starting place is : 

Marked price of an item is Rs 200. On purchase of 1 item discount is 22 % on purchase of 4 items discount is 33 % Rabia buys 5 items, what is the effective discount? 

In an alloy, the ratio of copper and zinc is 7 : 6. If 1,450 gm. of zinc mixed with in 14 kg 300gm. of an alloy, then the ratio of copper and zinc will be

For salaried parsons, standard deduction for Income tax is being raised from current Rs 40000 to Rs 50000. By how much percent standard deduction is increased ?