Multiple choice general knowledge math & puzzles Find out the wrong number in the series. 10, 26, 74, 218, 654, 1946, 5834 218 26 74 654 Reveal answer Fill a bubble to check yourself D Correct answer Explanation The pattern is (x * 3) - 4. (10*3)-4=26; (26*3)-4=74; (74*3)-4=218; (218*3)-4=650. The number 654 is wrong because it should be 650 based on the established mathematical progression.