Multiple choice Find out the missing number in the following number series? 12 17 30 59 113 (?) 198 195 208 205 None of these Reveal answer Fill a bubble to check yourself E Correct answer Explanation Pattern: differences are 5, 13, 29, 61. These follow 2×(difference)+3: 5×2+3=13, 13×2+3=29, 29×2+3=61. Next: 61×2+3=125. So 113+125=238. Not in options, so E is correct.