G GL1001 Member Joined Oct 3, 2009 Messages 70 Gender Male HSC 2011 Nov 9, 2009 #1 someone help me: Gemma stacks four blocks, each a different colour, on top of another to create a tower How many different towers can she make if she puts all four blocks in a different order each time?
someone help me: Gemma stacks four blocks, each a different colour, on top of another to create a tower How many different towers can she make if she puts all four blocks in a different order each time?
Uzername B.S., M.S., M.A., Ph.D. Joined May 30, 2009 Messages 88 Gender Male HSC 2011 Nov 9, 2009 #2 Since there are four combinations, you do: 4! A.K.A.: 4x3x2x1 = 24 Answer is D) 24.
annabackwards <3 Prophet 9 Joined Jun 14, 2008 Messages 4,670 Location Sydney Gender Female HSC 2009 Nov 9, 2009 #3 Well let's assume she begins stacking from the bottom. She has 4 different blocks she can pick. Then for each tower she has 3 for the next level, then 2 then 1. Therefore the answer is 4 x 3 x 2 x 1 = 24
Well let's assume she begins stacking from the bottom. She has 4 different blocks she can pick. Then for each tower she has 3 for the next level, then 2 then 1. Therefore the answer is 4 x 3 x 2 x 1 = 24
G GL1001 Member Joined Oct 3, 2009 Messages 70 Gender Male HSC 2011 Nov 9, 2009 #4 ok i get it, thanks to the both of you