Question

Prof. Hall's age is a multiple of 4 and 10

Her age is one away from a multiple of 9
She is younger than 90 years old.
How old is Prof. Hall?

Answer 1

If Prof. Hall's age is a multiple of 4 and 10, and one away from a multiple of 9, and she is younger than 90 years old, then Prof. Hall is 89 years old.