So, hear me out. Irrelevant rant below.
I was in class VIII and giving a competitive exam. I didn't manage my time well. It was an MCQ, lots of questions left, No negative marking.
So, I said let's draw a pattern for the remaining questions, and I did: ABCD... and repeat. It seemed so creative. I thought, wow, I am creative and smart. WRONG.
Stupid decision. If I had marked all As, I would have had, on average, a chance of getting 25% of questions right. Which I massively fucked up.
And, it was a qualification exam: So you qualify for the next round if you clear the cutoff. And did I? No. And how much did I miss the cutoff by? 1 mark. - 1 question out of 100.
After this, I learnt my lesson. Whatever happens, whatever my level of preparation, I try to game the system. Score more than what you have prepared for, what you deserve. And, it's worked out okay for me so far.