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How many numbers between 10^6 and 10^7 have a digit sum of 2?

 Dec 3, 2019
 #1
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There are 13 such numbers:

 

100001  100010  100100  101000  110000  200000  1000001  1000010  1000100  1001000  1010000  1100000  2000000  Total = 13 such numbers

 Dec 3, 2019
 #2
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Maybe this one should include only 6 numbers between 1,000,000 and 10,000,000. The last 7 in 10,000,000 should NOT be included. Is that right?

 Dec 3, 2019

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