Question 1194295
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Answer:  1,000,000
Delete the commas if needed.


Reason:
There are 10 items in the set {0,1,2,..,9} and 6 slots. That gives 10^6 = 1,000,000 (one million) different six-digit codes where repeat digits are allowed.


If you wanted, you can consider a smaller subproblem. Imagine you had only 2 slots to work with rather than 6. Then picture a 10 by 10 table to show the 10*10 = 100 two-digit codes possible. Extend this idea out to 6 digits and that's why we multiply.
We shorten the repeated multiplication by using exponents
10^6 = multiply out 6 copies of "10"
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