Problem B. 4795. (May 2016)

B. 4795. The hour hand and the minute hand of a clock are identical, and it has no second hand. How many time instants are there after noon and before midnight when it is impossible to tell the time by looking at the clock?

Proposed by M. E. Gáspár, Budapest

(3 pont)

Deadline expired on June 10, 2016.

Statistics:

47 students sent a solution.
3 points:	Csorba Benjámin, Fajszi Bulcsú, Kovács 246 Benedek, Lakatos Ádám, Nagy Kartal, Solymosi Zsófia, Szabó 417 Dávid, Szabó Kristóf, Szemerédi Levente, Várkonyi Dorka, Varsányi András, Weisz Máté.
2 points:	Döbröntei Dávid Bence, Fraknói Ádám, Fülöp Anna Tácia, Garamvölgyi István Attila, Klász Viktória, Kuchár Zsolt, Molnár-Sáska Zoltán, Noszály Áron, Páli Petra, Saár Patrik, Schefler Barna, Simon Dániel Gábor, Souly Alexandra, Sudár Ákos, Szakály Marcell, Vághy Mihály, Vári-Kakas Andor, Wiandt Péter.
1 point:	11 students.
0 point:	6 students.

Problems in Mathematics of KöMaL, May 2016