If x+y+z=10, x²+y²+z²=30, then the value of x³+y³+z³-3xyz is _________.

What is the product of (x + a) and (x + b)?

A person could save 20% of his income. A year later, his income increased by 25% but he could save the same amount only as before. By what percentage has his expenditure increased?

In a school of 200 students, the following chart represents the percentage of students involved in different sports.

What is the number of students playing cricket?

Which of the f ollowing numbers will replace the question mark (?) in the given series?
 15, 27, 12, ?, 9, 33

The marked price of a table fan is ₹3,750 and is available to the retailer at a discount of 20%. At what price should the retailer sell it to earn a profit of 15%?

45 people can repair a road in 10 days, working 6 hours a day. In how many days can 30 people, working 6 hours a day, complete the same work?

The value of sin 73⁰ + cos 137⁰ is: