How many positive integers less than 20 are either a multiple of 2, an odd multiple of 9, or the sum of a positive multiple of 2 and a positive multiple of 9?
A) 19
B) 18
C) 17
D) 16
E) 15
Is brute force the best way to solve?
A) 19
B) 18
C) 17
D) 16
E) 15
Is brute force the best way to solve?
