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anonymous
 one year ago
A combination question
anonymous
 one year ago
A combination question

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0How many 4digit numbers can be made from the numbers 1,3,5,7,9 and 0 if the numbers can be repeated (Remember  a number cannot start with 0)

wolf1728
 one year ago
Best ResponseYou've already chosen the best response.1You have six digits to work with, each of which can be repeated. So, I'd say your answer is 6*6*6*6 which equals 36*36 which equals 1,296

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Nope, its 1080 :/ (remember at 0 cannot be used in the start)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@wolf1728, I got it!

ChillOut
 one year ago
Best ResponseYou've already chosen the best response.0_ * _ * _ *_ The first number can't be 0, so you you have 5 numbers to work with for the first spot. 5 * _ * _ * _ The other ones can repeat, so we can fill the other spots with all numbers  6 5 * 6 * 6 * 6 = 1080.
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