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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 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.
How many the natural number from 1to 1000 have none of there digit repeated?
738 numbers
