Maths is not one interchangeable skill
Yes, someone can have strengths in some areas of maths while having dyscalculia. That possibility does not tell you whether it explains your own experience.
The British Dyslexia Association’s adult factsheet includes the possibility of managing geometry or algebra while finding arithmetic and numbers difficult. This is an example of an uneven experience, not a rule that everyone with dyscalculia must fit.
Consider how broad your own phrase “good at maths” is. Does it mean enjoying mathematical ideas, completing familiar written methods, passing an exam, or calculating mentally while someone waits? Those situations ask different things of you. Being successful in one is worth acknowledging without using it to dismiss every difficulty in another.
Include the method, time and support
When describing a success, record how you reached it. You might have used written steps, a calculator, a familiar example, extra checking or plenty of time. These details give a fuller picture of the experience. They are not reasons to discount the achievement.
Try a simple comparison in your notes: “I can do this comfortably when…” and “I get stuck when…”. For example, distinguish working through a written problem at home from estimating an answer in conversation. These are prompts for describing your circumstances, not diagnostic criteria or an experiment that can prove a learning difference.
Keep strengths in the conversation
The Dyscalculia Network’s adult resource discusses strengths alongside difficulties and cautions that research about particular strengths remains limited. A diagnosis should not be used to invent a special talent, and having talents should not make a person’s difficulties disappear from view.
If you seek an assessment, explain what you enjoy and do well as clearly as what you find difficult. Bring examples from real activities, including workarounds that have helped. A professional can consider the wider pattern rather than relying on a single description of your school results or career.
What a good online result means
A high accuracy score on a number-comparison task means you answered that task accurately under those conditions. It is not a verdict on all maths skills. Likewise, being slower on another task does not explain why. Neither result can diagnose or rule out dyscalculia.
If you use Neuropsych, read the task instructions and limitations before starting, then keep the result in proportion. You can be pleased with how the task went without treating it as the final answer to a long-standing question. If daily difficulties persist, use the result and your examples as context for a conversation with a qualified professional.
Educational guidance, not a personal diagnostic opinion. The linked specialist sources provide context; they do not endorse or validate Neuropsych’s tasks.