The number of different positive integers lying between 1015 and 1016, the sum of whose digits is equal to 2 is
a) 16 b) 24 c) 36 d) 64
What if it had been 3 instead of 2
Sorry becaue of meritnation I am unable to post long no. So please see the pic
http://s9.postimage.org/9tpc933zz/image.png
