7th Grade Math Teacher Considering Career Change After Failing To Convince A Single Student In His Class That 0 Is Not A Prime Number

In the midst of Dr. Roberts lecture on prime numbers, progress slowed considerably when he attempted to explain to his class that zero wasn't a prime number. Each and every pupil found it incomprehensible that zero divided by zero wasn't zero. Dr. Roberts maintained his composer and attempted to use logic to convince his students and laid out the following augment. "For example, we could say that 1/0 = 5. But there's a rule in arithmetic that a(b/a) = b, and if 1/0 = 5, 0(1/0) = 0*5 = 0 doesn't work, so you could never use the rule. If you changed every rule to specifically say that it doesn't work for zero in the denominator, what's the point of making 1/0 = 5 in the first place? You can't use any rules on it. So, when you divide zero by zero the answer is undefined."

Unmoved by the explanation, Lisa Gibbs remarked "but this is math class. You can't divide a number by zero and get a word."