‌ Here, ‌p−2016‌‌=q+2017 ‌‌=r−2018=s+2019 ∵r−2018=s+2019 ⇒r=s+2037 q+2017‌‌=s+2019 ⇒q‌‌=s+2 and ‌‌p−2016=s+2019 ⇒‌‌p=s+2035 where, p,q,r and s be natural number Hence, r=(s+2037) is the largest natural number.