math and skills


Senior Member

It's this paragraph

"There is also a reason why taking a traditional class can beat an online
brain-training program. Classes offer a level of complexity that has long-term
benefits; they not only employ cognitive skills, such as visual comprehension,
short- and long-term memory, attention to detail, and even math and skills,
but they often entail a social element with fellow classmates."

Just wondering if "math and skills" is a typo here.
And it's simply "math skills".
Book "Keep Sharp"

Thank you
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