Its as if my brain saw the 36 visually, but treated it mentally as 32.
I don't know how this is fixable... ugh. It's like you're looking at the color green but your brain is seeing blue.
This happens to me too! I am trying the following
1) Before I start any test/question bank I remind myself to be very careful and pay very close attention.
2) Spend a couple of seconds after a question to check my calculations
3) And like BB said, remembering to slow down(esp during the calculations)
Please let me know if you think of any other strategy. Thanks.