Which one number is wrong in the given series? 76, 79, 82, 91, 102, 115

The series 76, 79, 82, 91, 102, 115 should follow a pattern. Looking at differences: 76 to 79 is +3, 79 to 82 is +3, 82 to 91 is +9, 91 to 102 is +11, 102 to 115 is +13. The pattern seems to be adding consecutive odd numbers starting from 3: +3, +3, +9, +11, +13. But +3, +3 breaks this. Alternative: +3, +3, +9, +11, +13 - this isn't a clean pattern. Another view: 76+3=79, 79+3=82, 82+9=91 (but should be 82+5=87 for +5 pattern). The correct pattern is likely: add consecutive odd numbers: +3, +5, +7, +9, +11. Starting from 76: 76+3=79, 79+5=84, 84+7=91, 91+9=100, 100+11=111. But the given series is 76, 79, 82, 91, 102, 115. If 82 is wrong, it should be 84. Therefore 82 is the wrong number.