What is treble ?

What will happen to the area of a rectangle if its length is doubled and breadth is trebled.its length and breadth are doubled?

What is the least number of complete years in which a sum of money put out at 40% annual compound interest will be more than trebled?

A number is doubled and 9 s added. If the resultant is trebled, it becomes 75. What is that number? a. 3.5 b. 6 c. 8 d. none of these

The simple interest on a sum of money will be Rs. 600 after 10 years. If the principal is trebled after 5 years, what will be the total interest at the end of the tenth year?

19. A is one of 6 horses entered for a race, and is to be ridden by one of two jockeys B and C. It is 2 to 1 that B rides A, in whic case all the horses are equally likely to win; if C rides A, his chance is trebled what are the odds against his winning