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If repeated digits are allowed, then the largest 12-digit number is 999,999,999,999 .

If repeated digits are not allowed, then the largest 12-digit number is 989,898,989,898 .

If the same digit can't be used more than once, then the largest possible number has only

10 digits. The number is 9,876,543,210 .

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Q: The largest 12- digit number where repeated digits are allowed?

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The largest number with no repeated digits is 9,876,543,210 although it is 10 digits long, the largest 3 digit number with no repeated digits is 987

987654

9,999,999,999

987654

9876

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999,999,999,999

The largest ten digit number with no repeated digits is '9876543210'.

The largest number with no repeated digits is 9,876,543,210 although it is 10 digits long, the largest 3 digit number with no repeated digits is 987

The largest ten digit number with no repeated digits is '9876543210'.

987654

The largest ten digit number with no repeated digits is '9876543210'.

The largest 10-digit number with no digit repeated is 9876543210 !

987654

9,999,999,999

987654

97531

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