math
posted by peter .
(1A) Write the 11digit number that has a 2 in the ones place,1 in the tens place,a digit in the tenthousands place that is twice the digit in the ones place,the smallest odd digit in the billions place, 6 in the tenths place, and 0 in all the other places.
(1B) How did you calculate the digit in the billions place?

xxxxxxxxxx.x
xxxxxxxx12.x
xxxxx4xx12.x
1xxxx4xx12.6
1000040012.6
1 is the smallest odd digit