The following examples are all in Maths mocks:
1 - After some working, I arrive at the answer of 14:15 (which is right). I write 2:45pm in the answer space (yet I still would've gotten the mark, believe it or not).
2 - In a rationalising denominators question, after arriving at a fraction with a denominator of 5 (as opposed to root-5), I put the root sign back on the 5.
3 - I missed out the last 3 questions because I misread "QUESTION 22 IS WORTH 3 MARKS" as "THE PAPER IS WORTH 100 MARKS". If I had answered those questions in the mock, I would've got an A*.