Krypto Question

numbers: 2,3,8,14,20=7
answer: 8+14-20+2+3=7

Krypto Question

13,7,1,5,6=2

Mrs.Boughton put the answer on the board to be 3, but on the post it said 2. I got an answer for both, it's just for the answer to be 2 i could only get 4 numbers in the equation.

1.   (Answer for 3)          (13+1)'/.7+6-5=3

2.   (Answer for 2)           13-7-5+1=2

'/. -- this is suppose to be a division sign, there was no divisions signs on my laptop.