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Two ways to answer the question:

Method 1:

The biggest is 999999

The smallest is 100000

Since both are included, the number is 999999 - 100000 + 1 = 900000

Method 2:

The first digit is chosen from 1 to 9 - ie 9 options.

With each choice of the first, the second digit is chosen from 0 to 9 - ie 10 options.

With each choice of the first and second, the third digit is chosen from 0 to 9 - ie 10 options.

and so on till the sixth digit.

So total number of options = 9*10*10*10*10*10 = 900000.

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Wiki User

14y ago

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Anonymous

4y ago
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66

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Anonymous

4y ago
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