*1076 - my education

Observe the differences, comparing two girls who only diverged educationally in college.

Based on difficulty per unit of developed brain cells,

My opinion: 'A' levels slightly > 'O' levels >> PSLE > College
Her opinion: College > 'O' levels slightly > 'A' levels >> PSLE

(For the uninitiated ...
PSLE = 6th grade
'O' levels = about 15 years old
'A' levels = about 17 years old)

What's your equation?