The number 16 completes this pattern. Each number is added to itself to produce the next number in the sequence.
2. 2, 7, 6, 11, 10, 15, 14, 19, _.
The number 18 completes this pattern. Five is added to the first number. One is subtracted from the sum. The steps are repeated using the last number in the sequence.
3. 2, 4, 5, 10, 11, 22, _.
The number 23 completes this pattern. The first number is multiplied by 2. The resulting number subtracted by 1. The steps are repeated using the last number in the sequence.