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How many different numbers can you make out of 1,2,3 and they can't have two of the same numbers in 1 problem ( can't be decimals) I think it 15?
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How many different numbers can you make out of 1,2,3 and they can't have two of the same numbers in 1 problem ( can't be decimals) I think it 15?
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Apr 3, 2018
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How many different numbers can you make out of 1,2,3 and they can't have two of the same numbers in 1 problem ( can't be decimals) I think it 15?
Mathematics
middle-school
Chen Xing
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Chen Xing
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1
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there are 3 different numbers
slot method
how many 3 digit numbers?
321
312
123
132
213
231
6 numbes
how many 2 digit numbers?
12
21
13
31
23
32
6 numbers
how many 1 digit numbers
1
2
3
3 of them
6+6+3=15
15 different number, yah you ar right
Matthew Arkin
answered
Apr 7, 2018
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Matthew Arkin
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