Question: root 5 is equal to?
Answer: The approximation 16172 (≈ 2.23611) for the square root of five can be used. Despite having a denominator of only 72, it differs from the correct value by less than 110,000 (approx. 4.3×10−5). As of November 2019, its numerical value in decimal has been computed to at least 2,000,000,000,000 digits.