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Matematika oktatási portál
P. 3943. John showed his friends that with his glasses he can collect the Sun's rays and light a piece of paper. When the Sun is shining why don't his glasses burn the skin near his eyes?
Deadline expired on 12 February 2007.
Statistics on problem P. 3943. 116 students sent a solution.
3 points:90 students.
2 points:12 students.
1 point:9 students.
0 point:4 students.
Unfair, not evaluated:1 solution.