Yes. You need to define a level of blood pressure which would allow you to classify the patient as hypertensive or not according to whether their blood pressure was above or below that value. You will then have a binary qualitative variable. The classification may need to be bivariate: systolic and diastolic, but that does not change the argument.
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no
No it is qualitative
No, it could be a qualitative variable.
A qualitative variable: such as your favourite fruit.
No because it is numerical and so therefore it is quantitative