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the largest five digit number that can be formed using the digits 7 and 9 is 97,000

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Depending on exactly how you define "using the digits 7 and 9", it would be 99999, or 99997.

99997

Q: What is the largest five digit number that can be formed using the digits 7 and 9?

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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

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 only10 digits. The number is 9,876,543,210 .

The largest 3 digit number whose digits are all primes is 777. The largest 3 digit number with different prime digits is 753.

You get the largest number if you sort the digits, from largest to smallest.

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As a string, the largest number is 7111111.

86420

99997

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'.

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 only10 digits. The number is 9,876,543,210 .

651

The largest 3 digit number whose digits are all primes is 777. The largest 3 digit number with different prime digits is 753.

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

You get the largest number if you sort the digits, from largest to smallest.

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