K. 152. 3% of the 800 inhabitants of the planet Awr have two heads. Half the remaining inhabitants have three heads, and the other half have only one. A shipment of fruits is arriving from the neighbouring planet Bwr: one delicious cwr for each head. How many, exactly?
(6 points)
This problem is for grade 9 students only.
Deadline expired.
Google Translation (Sorry, the solution is published in Hungarian only.)
Megoldás. 1600 cwr érkezik, hiszen ha minden 3 fejű mellé egy 1 fejűt állítanánk, akkor együtt 4 fejük lenne, tehát számolhatnánk úgy, mintha mindenkinek 2 feje lenne.
Statistics on problem K. 152.  196 students sent a solution.  
6 points:  138 students. 
5 points:  25 students. 
4 points:  12 students. 
3 points:  9 students. 
2 points:  1 student. 
0 point:  2 students. 
Unfair, not evaluated:  9 solutions. 


Problems in Mathematics of KöMaL, January 2008
