I am currently familiar with the method of checking if a number is divisible by $2$, $3$, $4$, $5$, $6$, $8$, $9$, $10$, $11$. However is there a way to check if a no is divisible by $23$ ?
I read something at this link regarding this matter but couldn't really figure out what the author was trying to say. Any help in this regard would be appreciated. Thanks.