Mathematical and Physical Journal
for High Schools
Issued by the MATFUND Foundation
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Problem K. 458. (March 2015)

K. 458. Johnny wanted to buy some nails. In one shop, where 100 grams of nails cost 180 forints (HUF, Hungarian currency), he could not buy the quantity needed since he was 1430 forints short. So he went to another shop where 100 grams only cost 120 forints. He bought the quantity he needed, and 490 forints still remained in his pocket. How many kilos of nails did he need?

(6 pont)

Deadline expired on April 10, 2015.


Statistics:

103 students sent a solution.
6 points:67 students.
5 points:16 students.
4 points:7 students.
3 points:5 students.
2 points:1 student.
0 point:1 student.
Unfair, not evaluated:6 solutions.

Problems in Mathematics of KöMaL, March 2015