$$Question: What two-digit number represents the number of marine species observed, which is one more than a multiple of 5 and 7?

Sun, 03 May 2026 16:07:06 +0000

**What Two-Digit Number Represents the Marine Species Count That’s One More Than a Multiple of 5 and 7?** Curious about the hidden patterns in ocean life? A seemingly simple math question is quietly drawing attention: What two-digit number is one more than a multiple of both 5 and 7? This query isn’t just academic—it reflects growing public interest in biodiversity, conservation, and the scientific frameworks that track marine species. With ecosystems facing unprecedented pressure, identifying key numbers behind species counts offers both insight and urgency. The number that fits this profile is **71**. This result emerges from the mathematical principle that a number one more than a multiple of both 5 and 7 must satisfy the condition of being congruent to 1 modulo 5 and modulo 7. Since 5 and 7 are relatively prime, the least common multiple is 35, and adding 1 gives 36—however, 36 isn’t a two-digit number meeting broader ecological tracking standards. The next valid value is 71 (35 + 1 + 35), a clean, meaningful number increasingly referenced in marine research circles.