How many odd numbers are possible between 1 to 1000000000? find out the number of odd number of digits?  Pick one:
A) 2999
B) 3500
C) 4000
D) 4599
E) 499999999
There are always one odd and one even no. And the question is odd no. Between 1 to 1000000000   So we have to find no. Between 1 to 1000000000 so we should not includes 1   1000000000/2 -1= 
<gadget id="calculator">1000000000/2 -1</gadget>
<output>499_999_999</output>
499999999   ANSW499999999R:499999999
<result>E</result>
How many odd numbers are possible between 1 to 1000000000? find out the number of odd number of digits?