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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.
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Is the single digit number greater than 9?
There is no single digit number greater than 9. After 9 is 10, which is a double-digit number.
How many 6 number combination can be made from 0 to 9?
For a six digit number the most significant digit cannot be zero (it will otherwise cease to be a six digit number). So MS digit can be 1,2,3,4,5,6,7,8, or 9. The Other five digits can be 0,1,2,3,4,5,6,7,8, or 9. Hence total number of six digit numbers that can be made with 0 to 9 is 9 x 10 x 10 x 10 x 10 x 10 = 900000
What is the Units Digit of 9 to the 21st?
The number in the units digit of the number 921 is 9.
What is the greatest 9 digit number with no digit rejected?
With no digit rejected, 999999999 With no digit repeated, 987654321
Which digit is in the tenth's place in the number 1465.98?
The digit in the tenths place of the number 1465.98 is the digit 9.
