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Be consistent. If writing in paragraph form, if one is typed, then type twelve.

Or, 1 and 12.

Q: Should the numbers 1 through 9 be written out?

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You can select 9 numbers for the first digit, 8 numbers for the second digit, and 7numbers for the third digit; so 504 (e.g. 9*8*7) different three digit numbers can be written using the digits 1 through 9.

The sum of the numbers from 1 through 100 is 5,050.

The sum of the numbers 1 through 27 is 378.

The sum of all the numbers 1 through 200 is 20,100.

There are 25 prime numbers from 1 through 100.

Related questions

The numbers 1 through 10 should be written out as: One, Two, Three ... etc. From the numeral "11" and beyond, they can be written as numbers.

You can select 9 numbers for the first digit, 8 numbers for the second digit, and 7numbers for the third digit; so 504 (e.g. 9*8*7) different three digit numbers can be written using the digits 1 through 9.

The sum of the numbers from 1 through 100 is 5,050.

The sum of the numbers 1 through 27 is 378.

The factors of all the numbers 1 through 30 include all the numbers 1 through 30.

2

The sum of all the numbers 1 through 200 is 20,100.

There are 25 prime numbers from 1 through 100.

1. The numbers 1 through 99 are 99 different numbers; each one occurs once.

1 and 1 quarter of a million written in numbers is 1,250,000.

The sum of all odd numbers 1 through 99 is 9,801.

Any of their multiples