IMO- Mathematics Olympiad Class 8: Questions 105 - 111 of 1029

Of a number divided by of a square of same number make . The number is_.

5 years ago a father’s age is 3 times greater to his son’s age. In present age of a son is 15 years then how old the father is?

Find two consecutive negative integer, whose product is 90.

If of a number is 32 more than the original number, then the number is_.

The length of a rectangle is 4 m more than twice of its breadth. The length and breadth of the rectangle if its perimeter is 140 m, is_.

If the angles of a triangle are in the ratio 1: 2: 3, then the difference between the greatest and smallest angles is_.

Two angles in a triangle in the ratio 3: 2. If the sum of these angles is equal to the third angle, then the third angle is_.