What is the simplified value of 18 - 12 ?

What is the simplified value of 18 - 12 ?

Puneet purchases 5 dozens of oranges at the rate of Rs 120 per dozen. He sold each one of them at the rate of Rs 11.5. What is the profit (inpercentage) of Puneet?

The ratio of selling price to the cost price is 13 : 17. What is the loss percentage?

Simple interest on a sum for 5 years is equal to 20% of the principal. In how many years interest will be equal to the principal?

Average of 31 numbers is 19. If the average of first 8 numbers is 24, then what is the average of the remaining numbers?

The ratio of milk and water in three samples is 1 : 3, 3 : 5 and 11 : 5. A mixture containing equal quantities of all three samples is made. What will be the ratio of milk and water in the new mixture?