Solution: To find the number, compute the least common multiple (LCM) of 7 and 11, then add 1. Since 7 and 11 are coprime, $ ext{LCM}(7, 11) = 7 imes 11 = 77$. Adding 1 gives $77 + 1 = 78$. The two-digit number is $oxed{78}$.

Sun, 10 May 2026 04:01:04 +0000

Content under review