Are both these sentences correct, and is one of them better than the other for everyday language ?
I raised my score.
I increased my score.
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They are both valid.
I would prefer "increased" for everyday usage, as it feels more quantitative. To me, "raised" can imply a more physical raising, or, a non-incremental raising, e.g., "raising the bar", which is often used to mean setting a higher standard, but is based on the idea of physically raising a bar. "Raise" is generally less quantitative and more qualitative.