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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 on 11 February 2008.

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.
 202 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. Unfair, not evaluated: 6 solutions.

• Problems in Mathematics of KöMaL, January 2008

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