Are you sure its not,
How many positive integers exist between 10^6 and 10^7 whose sum is equal to 2?
If so then 7 would make sense because,
Were thinking of all the numbers that could add to 2 between 1,000,000 and 9,999,999. The only numbers that would add to to are those with two ones and the rest zeros and numbers with one two and the rest zeros.
You could do the math;
Combinations of 1000001, where the first one must stay and place is; 6!/(5!*1!)=6
And there would only be one number with a 2 at the beginning and rest are zeros; 2,000,000.
If you dont want to do the math just write it out.
1,000,001
1,000,010
1,000,100
1,001,000
1,010,000
1,100,000
2,000,000
Thanks,
Jared
