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There are a total of 900 3-digt numbers (100 thru 999);
Of these there are 9x9x8 = 648 numbers that do not contain
repeating digits (first position: 9 possibilities, second place 9 possibilities;
the 10 digits minus the one used in the first place. and third place 8 possibilities;
10 digits minus the two used in the first and second places)
So, there should be 900-648=252 3-digit numbers with
at least one repeating digit.
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How many 7 digit phone numbers can be formed if all the numbers can be repeated?
823543
How many 3 digit numbers can be created if no digit can be repeated?
720 (10*9*8)
How many four digit numbers are possible from the digit 0'1'2'3'4 numbers may be repeated?
625 if numbers can have leading 0s, 500 otherwise.
How many two-digit numbers in base ten can be formed if the tens digit cannot be 0 and no digit can be repeated?
81
How many different 6 digit serial numbers are available if no digit can be repeated?
9x9x8x7x6x5 = 81x56x30 = 136080
How many three digit numbers have no repeated digits?
757
How many 7 digit phone numbers can be formed if all the numbers can be repeated?
823543
How many 3 digit numbers can be created if no digit can be repeated?
720 (10*9*8)
How many numbers are between 100000 and 125000 where the digits are in order from least to greatest no digit can be repeated?
There is only one number and that is 123456.
How many four digit numbers are possible from the digit 0'1'2'3'4 numbers may be repeated?
625 if numbers can have leading 0s, 500 otherwise.
How many 8-digit numbers have no repeated digits?
9x9x8x7x6x5x4x3 =1632960
How many 6 digits numbers can be formed from the digit 01357 and 9 which are divisible by 10 and no digit is repeated?
There are 5! = 120 such numbers.
How many two-digit numbers in base ten can be formed if the tens digit cannot be 0 and no digit can be repeated?
81
How many different 6 digit serial numbers are available if no digit can be repeated?
9x9x8x7x6x5 = 81x56x30 = 136080
How many possible 3 digit numbers can be made using the digits 604?
There are 4 possible numbers if the digits are not repeated; 18 if they are. Those are 3-digit numbers, assuming that zero would not be a leading digit. If zero is allowed for a leading digit, then you can have 6 for the non repeated, and 27 if repetition.
How many 5 digit numbers can be made from the numbers 0 1 2 if digits can be repeated?
162
How many 3 digit numbers can be formed from the digits 357 with any digit repeated?
27 three digit numbers from the digits 3, 5, 7 including repetitions.
