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Earn +20 ptsQ: How many 4-digit numbers are there if no digit is repeated?
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Continue Learning about Math & Arithmetic
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
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