30 is okay, 29 is not
Is it weird that, when adjusting the volume on the sound system in my car, I only set it to an even number OR a factor of five? 35? No problem. 28, that’ll work. 40, rock on!
But 27? No way. 33? Ri-i-ight. 19? Are you kidding? 19 IS AN ODD NUMBER.
