Create the sample space and weed out the offending options: 
11 21 31 41 51 61 
12 22 32 42 52 62 
13 23 33 43 53 63 
14 24 34 44 54 64 
15 25 35 45 55 65 
16 26 36 46 56 66 
Delete everything that doesn't have 2 
 
 21 
12 22 32 42 52 62 
 23 
 24
 25 
 26 
 
Now delete everything that sums to 6 or less 
 52 62 
25 
26 
 
and that's it; 4 left out of 36