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µî·ÏÀÏ 2011-04-24 10:26

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1¹øºÎÅÍ 150¹ø ±îÁöÀÇ ¹øÈ£¸¦ °¡Áø 150¸íÀÇ Çлý°ú 1È£ºÎÅÍ  150È£±îÁöÀÇ ¹øÈ£¸¦ °¡Áø 150°³ÀÇ ´ÝÇôÀÖ´Â ¹®ÀÌ ÀÖ´Ù. n¹øÀÇ »ç¶÷ÀÌ nÀÇ ¹è¼ö°¡ ÀûÈù ¹®À» ´ÝÈù °ÍÀº ¿­°í, ¿­¸° °ÍÀº ´Ý´Â´Ù°í ÇÑ´Ù. 150¹ø±îÁöÀÇ ÇлýÀÌ ¸ðµÎ ÀÌ·¸°Ô ÇÑ ÈÄ ¸¶Áö¸·¿¡ ¿­·Á ÀÖ´Â ¹®Àº ¸ðµÎ ¸î °³Àΰ¡?

 

 


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ÁÒÀ̾¾ 2011-05-03 08:10 
°°Àº ÇüÅÂÀÇ ¿µ¾î ¹®Á¦°¡ À־ ½Ç¾î º¾´Ï´Ù.

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

Àç¹ÌÀֳ׿ä. ¿µ¾î·Î ¾²¿© Àִµ¥µµ ºÒ±¸Çϰí À§ÀÇ ±¹¾î·Î µÈ ¹®Á¦º¸´Ù ÀÌÇØÇϱⰡ ½±³×¿ä.


Åä´ë 2011-04-24 13:27 

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