7, 26, 63, 124, 215, 342, ?

If a:b = 4:7 and b:c = 5:9, find a:c.

Out of 13 players, 11 players are to be selected for a cricket team. In how many ways can this be done?

  If “*” is called “+”, “/” is called “*”, “-” is called  “/”, “+” is called “-”. 40/20 – 5 * 10 + 5 = ? 

Find the compound interest on Rs. 16,000 at 20% per annum for 12 months, compounded quarterly.

Six years ago, the ratio of the ages of Kunal and Sagar was 6: 5. Four years hence, the ratio of their ages will be 11: 10. What is Sagar's age at present?

The average weight of a class of 40 students is 40 kg. If the average weight increases by 500 g when the teacher's weight is included, what is the weight of the teacher?

 Two pipes M and N can fill a tank in 22 hours and 33 hours respectively. In how much time will the tank be full, if both the pipes are opened simultaneously?
 

The average salary of 20 workers in an office is ₹1,900 per month. When the manager's salary is added, the average salary becomes ₹2,000 per month. What is the manager's annual salary?

 A cube is painted in such a way that a pair of adjacent faces is painted in green; a pair of opposite faces is painted in yellow and another pair of adjacent faces are painted in red.
This cube is now cut into 125 small but identical cubes. 

 How many small cubes have exactly two painted face and have exactly two colors on them?