Mathematics
Write all possible 2-digit numbers formed by the digits 3, 7 and 9, when repetition of digits is not allowed.
Number System
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Answer
All possible 2-digit numbers formed by the digits 3, 7 and 9, when repetition of digits is not allowed are;
Starting with 3:
37
39
Starting with 7:
73
79
Starting with 9:
93
97
Hence, the possible 2-digit numbers are 37, 39, 73, 79, 93, 97.
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