Sylvestre

To earn an A in a course, a student must have a final grade of at least 0.9. On the first our examinations, a student scores 0.87, 0.89, 0.91, and 0.85. If the scores in the final examination counts as two examinations, what must this student get on the f...

The sum of a two digit number is 6. The number with the digits interchanged is 3 times the tens digit of the original number. Find the original number.

Aris is twice as old as Rico while Jay is 24 years younger than Aris. If half of Aris' age six years ago was three less than one half the sum of Rico's age in four years and Jay's present age, then what is their ages before and now.

The width of a rectangle is 20m less than twice its length. If the perimeter of the rectangle is more than 56m, find the minimum dimensions of the rectangle if each dmension in meters is an integer.