Jul 23 2013, 11:30 AM
9503 = 2
20 minutes, because I tried to find logical explanation, and then I read the text again, and started thinking what would kids look for to get it solved in 5-10 minutes.
20 minutes, because I tried to find logical explanation, and then I read the text again, and started thinking what would kids look for to get it solved in 5-10 minutes.