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Earn +20 ptsQ: When did South Australia use 6 digit phone numbers?
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How many 7 digit phone numbers can be formed if all the numbers can be repeated?
823543
How many 7 digit phone numbers can be formed if the first digit cannot be 0 or 1 and any digit can be repeated?
Using your rule - essentially, it's the simplified sum of 9999999-2000000 which is a total of 7999999 numbers !
How many 7-digit phone numbers can be formed if the first digit cannot be 0 and any digit can be repeated?
7
How are the 16 digit voucher numbers for mobile phone top up vouchers generated to keep them unique and can anyone create a useable 16 digit number?
3662361496673488
How many digit is fax number?
a fax number is just the same as a phone number so the same number of numbers
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