GrogNerd
mean old man
Did the customer reply: What's maths hot to do with it?
foundational system of mathematics called Set Theory
she's looking for the intersection of two groups
A = Active Status
B = Live in Missouri.
she wants people who are A AND B, she was using a filter that was A OR B
Kiwi schools not teach this stuff?
here's something that might blow your mind: when you count money, you're using ALGEBRA