When Sam said that Peter couldn't deduce the sum, he was right because the only possible case when Peter was able to was if the sum was 1+prime, which is wrong in this case (135 is not prime).
Kapag Sam said na si Pedro ay hindi maaaring pagbatayan sa kabuuan, siya ay may karapatan dahil ang maaari lamang kapag ang kaso ni Pedro ay magagawang ay kung ang kabuuan ay 1 + kataas-taasan, na kung saan ay mali sa kasong ito (135 ay hindi kalakasan).