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May 23rd, 2014, 10:00 PM  #1 
Member Joined: Apr 2014 From: Missouri Posts: 39 Thanks: 1  How many different structure possible with 4 cube
Hi Four 1 unit cubes are joined face to face in all possible ways to form a structure. Two such structures are considered same if one can be obtained from another by rotation. How many different structure is possible to make? I get the answer 5. But the answer is 8. Thanks in advance 
May 24th, 2014, 12:03 AM  #2 
Senior Member Joined: Nov 2013 From: Baku Posts: 502 Thanks: 56 Math Focus: Geometry 
1 means cube, 2 means 2 cubes one on the another. (a) 1111 (b) 111 ___1 (c) 11 ___11 (d) 1 ___11 _____1 (e) 111 _____1 (f) 12 _____1 (g) 11 _____2 Option (g) has 2 variants, which you can't get one by rotating other. 

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