Sakazuki-san Chi no Gikyoudai - Vol. 1 Ch. 3 - Parent's day

[MangaDex]

 

[KarenSapphire]

even I can't solve that math problem ?

 

[DaoLaw]

I think I understand this problem, maybe, I'm not sure since there's Japanese in the middle. But I think I can't solve this, let me have hopes...~

 

[cax1994]

so cute. really love his big(smol) bro

 

[KE1tea]

And that’s how a secret cult started to follow him.

 

[Ayanchan]

Why are they solving Fourier series in middle school? It's college level

 

[justforthelulz]

@Ayanchan

Sixth grade, so primary/elementary school. (see page 2)
Also, being a private/elite institution means the curriculum is expected to be significantly tougher than average public institutions.

 

[Ayanchan]

@justforthelulz that's insane. It's ok if it's done in 10th standard but 6th is just too much