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You are watching: How many possible combinations of 6 numbers

we will uncover how plenty of numbers contain no ones:

There room 9 choices of numbers for the first digit: 0,2,3,4,5,6,7,8,9

Simarly there room 9 selections for the second, third, fourth, fifth,and 6th digits.

Applying the an essential counting to organize there are 9x9x9x9x9x9 various numbers through no persons ; `9^6=531441` .

We...

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We will find how countless numbers save on computer no ones:

There room 9 selections of numbers because that the an initial digit: 0,2,3,4,5,6,7,8,9

Simarly there space 9 choices for the second, third, fourth, fifth,and 6th digits.

Applying the an essential counting organize there are 9x9x9x9x9x9 different numbers with no ones ; `9^6=531441` .

We can use the an essential counting to organize to find the total number of 6 digit numbers: 10x10x10x10x10x10-1 (000000 is not allowed). Therefore there room `10^6-1=999999` different numbers.

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**There room 999999-531441=468558 different numbers through at least one 1 in them.See more: How Are Algae Different From Plants ? How Are Algae Different From Plants**

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