For 10% increase one would guess you could just overclock the brain, if we knew enough about the brain to connect hardware to it. I think you'd be more likely

For 10% increase one would guess you could just overclock the brain, if we knew enough about the brain to connect hardware to it. I think you'd be more likely to get an arithmetic co-processor to start, wire neurons in such a way up to a small circuit that you get precise mathematical intuitions based on it. Being incredible at math from birth would likely change your life indescribably.