The difference between two numbers is 5 and the difference between their square is 65. What is the smaller number?
In how many ways can a group of 5 men and 2 women be made out of a total of 7 men and 3 women?
In a box, there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither blue nor green?
The area of a squeare is three-fifths the area of a rectangle. the length of the rectangle is 25 cm and its breadth is 10 cm less than its length. What is the perimeter of the square?