the first number is usually in feet, the last number is in inches. so the last number = 1/12 of the first numbers value.
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With 6 binary digits, you have 26 different possibilities. This is because there are two possibilities for each digit, and each digit is independent of the other digits - so you just multiply the possibilities for each digit together.
The answer depends on which digit is 5 and what the other digits are!
All of the digits are significant:Any digit after the decimal point is significant.A zero is significant if it comes between other significant digits.
22621, 44742, 66863, 88984
For the first digit, you have 9 options (1-9; the 3-digit number would not start with 0). For the second digit, you also have nine options (any digit from 0-9, except the digit used for the first digit). For this third digit, you have only eight options, since two digits are "forbidden", regardless of what digits you used first. That gives a total of 9 x 9 x 8 combinations.