-- Each one must have either 3 or 4 digits.
-- The first digit must be the 6, the 7, or the 8 = 3 choices. For each of those ...
-- The second digit can be any of the 3 unused ones = 3 choices. For each of those ...
-- The third digit can be either of the 2 unused ones = 2 choices. For each of those ...
-- The fourth digit can be either the unused one or else blank = 2 choices.
Total number of choices = 3 x 3 x 2 x 2 = only 36 possibilities. I am surprised.
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Only two real numbers but infinitely many complex numbers.
Sure, since there are INFINITELY MANY prime numbers, that means you will find prime numbers over any given number.
The number of combinations of six numbers that can be made from seven numbers will depend on if you can repeat numbers. In all there are over 2,000 different numbers that can be made.
there are maybe over 1 million numbers in decimals
No Can make 5.5 over 14 and so on, but 11/28 are the two lowest whole numbers