Multiple choice general knowledge math & puzzles If Log 4 (x) = 12, then log 2 (x / 4) is equal to 11 48 -12 22 Reveal answer Fill a bubble to check yourself D Correct answer Explanation If log4(x) = 12, then x = 4^12. We need log2(x/4). x/4 = 4^12 / 4^1 = 4^11. Since 4 = 2^2, 4^11 = (2^2)^11 = 2^22. Therefore, log2(2^22) = 22.