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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) 1-1-1-1 (b) 1-1-1 ___1 (c) 1-1 ___1-1 (d) 1 ___1-1 _____1 (e) 1-1-1 _____1 (f) 1-2 _____1 (g) 1-1 _____2 Option (g) has 2 variants, which you can't get one by rotating other.

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### how many structures are possible with 4 cubes

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