I am extremely strict when it comes to getting bonuses from things like Math Boost, or the Instinct sleight. The player has to be able to convince me (and the rest of the table) that it really makes sense that their ability to do Lorentz transformations in seconds helps with the particular task. Hacking/Programming? Probably not. Knowing a lot of programmers, and quite a few white hats, they are almost universally bad at maths. That’s what the computers are for. Being able to do any of the calculations involved in the actual program doesn't really help them all that much. They know the theory, and how to apply it, but most wouldn't get any benefit from doing it in their heads. Navigation? It could be useful, if they have the tools to make it useful. But getting from Regent Street to the Albert Bridge? No bonus there. Demolitions? Maybe, if they had all the structural information on a building and needing to calculate where to put the explosives. But they would need to get all that information first. And if they have it, why not just run it through a computational model? So, at my table, it doesn't go very far. A creative player might be able to get the bonus in a few places that I wouldn't think of. But they do have to be creative about it, not just make up a random reason. If it is thematically appropriate that their awesome multiplying skills come in handy, then they get the bonus. It is applicable in knowledge tests a lot more than active tests, I have found. The ship we are on is burning retrograde and losing altitude? We need to know exactly how long we have before we de-orbit, and we happen to have our current orbital mechanics data but no computer? Never fear, we have Math Boy (even though the actual calculations would probably take a few minutes for anyone with training to back-of-napkin out).