Multiple choice general knowledge math & puzzles log 1 + ln 1 =? (ln refers to natural logarithm which has a base 'e') 0 1 2 e 0.632 0.2303 Reveal answer Fill a bubble to check yourself A Correct answer Explanation The logarithm of 1 in any base (including base 10 for 'log' and base 'e' for 'ln') is always 0. Therefore, 0 + 0 = 0.