is total possibility in the under (ii) is
4+3+2+1
+3+2+1
+2+1
+1
20
Similarly for unit digit 6
The number of numbers are
with starting digit
1 = 6+5+4+3+2+1
2 = 5+4+3+2+1
3 = 4+3+2+1
4 = 3+2+1
5 =2+1
6 =1
Total = 56
Similarly for unit digit 8
The number of numbers are
With starting digit
1 = 8+7+6+5+4+3+2+1
2 = 7+6+5+4+3+2+1
3 = 6+5+4+3+2+1
4 = 5+4+3+2+1
5 = 4+3+2+1
6 = 3+2+1
7 = 2+1
8 = 1
Total = 120
So total possible number = 4+20+56+120 = 200 Ans
