If you meant 123, the mean of one number is itself. If you meant 1,2 and 3, you add the numbers and divide by the number of numbers, so (1+2+3)/(1+1+1) = 6/3 = 2
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123
123
If you mean what number you used to dial before it changed to 123 - it was 8081
The average American IQ is 98
It is: 123+123 = 246