13+6+10= 20+8+5= 18+10+8=

Let's calculate each of these sums:

1. \( 13 + 6 + 10 = 29 \)
2. \( 20 + 8 + 5 = 33 \)
3. \( 18 + 10 + 8 = 36 \)

So, the answers are:

1. 29
2. 33
3. 36