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In a straight line, 16 digits in 4 groups of four.In a straight line, 16 digits in 4 groups of four.In a straight line, 16 digits in 4 groups of four.In a straight line, 16 digits in 4 groups of four.
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There are different numbers of combinations for groups of different sizes out of 9: 1 combination of 9 digits 9 combinations of 1 digit and of 8 digits 36 combinations of 2 digits and of 7 digits 84 combinations of 3 digits and of 6 digits 126 combinations of 4 digits and of 5 digits 255 combinations in all.
The digits that are reported in an answer are called significant figures.
Numbers and fingers are both called digits.