Problem C. 1343. (March 2016)
C. 1343. At present, a father is five years older than the total age of his three sons. In ten, twenty, and thirty years, the father's age will be twice the age of his first, second and third son, respectively. How old is the father now, and how old are his sons?
Deadline expired on April 11, 2016.
|145 students sent a solution.|
|5 points:||128 students.|
|4 points:||11 students.|
|3 points:||4 students.|
|2 points:||1 student.|
|1 point:||1 student.|