Five years from now, the sum of the ages of a woman and her daughter will be 40 years. The difference in their present age is 12 years. How old is her daughter now?

M=Mother, Daughter

M - D = 12,

[M + 5] + [D + 5] = 40, solve for M, D

M = 21 - Mother's age now

D = 9 - Daughter's age now

Note: You mean the Mother gave birth to her daughter when she was 12 years old??! Did you make this question up?

No, I did not make it up actually.