+47 The positive integers1,2,3... are listed in order. What is the 1000th positive integer with an odd number of digits?
If you list all integers IN ORDER from 1 until you encounter the 1000th integer whose digits are all ODD, this is the 1000th number:
listfor(n, 1, 13779, n)==(1, 2, 3, 4, 5, 6, 7................13775, 13776, 13777, 13778, 13779)
13,779 is 1000th integer with all its digits ODD, provided the question counts ONLY those numbers with ODD digits: 1, 3, 5, 7, 9, 11, 13....31,....51,.....71,......111,.....1111,......13,771, 13,773, 13,775, 13,777, 13,779 is the 1000th number.
