You can admit you’re good at something without apologizing for it. Accuracy isn’t arrogance.

Playing down a real strength is not modesty, it is inaccuracy pointed the other way. Arrogance means claiming more than the evidence supports, while saying plainly that you are quick at math or good with people, when you are, is just a correct description. Constant deflection also hands other people the job of reassuring you. Nobody enjoys that for very long.

Say thanks the next time somebody compliments your work, and add nothing after it. No joke, no correction, no crediting luck when it was not luck. Then be equally plain about what you are not good at, because that is what makes the first part believable.