(Zoe Blackbell is a older sister (older twins) of his young sister, Becky Blackbell, Zoe is an mature and intelligence sister, 12 years old, Becky Blackbell is Zoe young sister, the young twins, 12 years old too, a spoiled brat and dumb child, she is very stubborn, and immature. They're only different 5 minutes(in age)

Zoe: Come on! 21×89 is not 23!

Becky: oh wait, I got it, is it ten?

Zoe: frustasted

Becky: pouts I don't know! Math is hard!