Q: What number system uses only the digit 0 through 7?

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binary system

A one digit number is a number with only one number. For example: 12 is a two digit number. It has two numbers. 3 is a one digit number because it only has one number.

6 is the only single digit perfect number.

A digit in math is a component of a natural number which is less than the base of the number system you are using. Natural numbers are all of the non-negative integers, sometimes including zero. So in the decimal number system, which has a base of 10, a digit is any number from 0 to 9. If you are using the binary number system, which has a base of 2, a digit can only be a 0 or a 1. If you are using the hexadecimal number system, which has a base of 16, a digit is any number from 0 to 15 (the numbers 10-15 are generally represented as A, B, C, D, E, F). If you are using the Sexagesimal number system, which has a base of 60, a digit is any number from 0 to 59. This is the number system which the Babylonians used, which is one of the reasons why we divide an hour into 60 minutes, and a minute into 60 seconds. This is also why we have 360 degrees to a circle.

Nothing in this universe: 16,25,36,49,64 & 81 are the only 2-digit squares.

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binary system

A one digit number is a number with only one number. For example: 12 is a two digit number. It has two numbers. 3 is a one digit number because it only has one number.

6 is the only single digit perfect number.

A 0 or 1 in a binary number is called a bit. A binary number is made up of only ones and zeroes.

A number cannot have a place value - only a specific digit with a number can have a place value.A number cannot have a place value - only a specific digit with a number can have a place value.A number cannot have a place value - only a specific digit with a number can have a place value.A number cannot have a place value - only a specific digit with a number can have a place value.

There isn't a specific digit. The last nine digits are a unique unique serial number for the vehicle. The dealer can run it through their computer system to get a list of options that it was built. This only works on vehicles made in the last twenty years or so.

Since there are only five different digits, a 6-digit number can only be generated if a digit can be repeated. If digits can be repeated, the smallest 6-digit number is 111111.

A digit in math is a component of a natural number which is less than the base of the number system you are using. Natural numbers are all of the non-negative integers, sometimes including zero. So in the decimal number system, which has a base of 10, a digit is any number from 0 to 9. If you are using the binary number system, which has a base of 2, a digit can only be a 0 or a 1. If you are using the hexadecimal number system, which has a base of 16, a digit is any number from 0 to 15 (the numbers 10-15 are generally represented as A, B, C, D, E, F). If you are using the Sexagesimal number system, which has a base of 60, a digit is any number from 0 to 59. This is the number system which the Babylonians used, which is one of the reasons why we divide an hour into 60 minutes, and a minute into 60 seconds. This is also why we have 360 degrees to a circle.

900 It is the only three digit number with a nine in the numbers place

No. There's no two digit numbers that could do this. The largest two digit number is 99. If you add 99 to itself, you only get 198, which is much smaller than a four digit number.

Nothing in this universe: 16,25,36,49,64 & 81 are the only 2-digit squares.

One through nine all have single digit factors.