Students of class 8 took a test and got the following marks 79,12,29,39,70,78,15,67,41,79,32,68,28,72,73,69,16,52,17,19,74 If we put the marks in various ranges like 10-19, 20-29, 30-39 and so on, in which range would the most number of students have gotten marks?
Students from grade 5 class decided to collect money for earthquake relief. The amount (in QR) collected by each students equals to number of students in the class, If they collected a total of QR5329, how many students were there in the class?
Some mangoes are packed into a box in stacks. Each stack has the same number of mangoes in each row as the number of rows. The number of stacks is also the same as the number of rows. If there are 65 stacks of mangoes in the box, what is the total number of mangoes in the box?
There are few taps and holes in tank. Each tap can fill empty tank in 4 minutes, while each hole can empty a full tank in 8 minutes. If there are 3 taps and 2 holes, how long would it take to fill empty tank?
Pump A can fill a tank in 14 minutes, while pump B can fill the same tank in 35 minutes. Both pumps are turned on together to fill the empty tank, but when tank became half full, pump B stops working and rest of the tank is filled by pump A only. How long it took to fill the tank?