What number comes next in the series: 6, 13, 27, 55, 111, ?

💡 Solution & Explanation

Each term is the previous term × 2 + 1: 6 × 2 + 1 = 13, 13 × 2 + 1 = 27, 27 × 2 + 1 = 55, 55 × 2 + 1 = 111. So the next term is 111 × 2 + 1 = 223.