Question

Look at this series: 72, 76, 73, 77, 74, __, 75,... What number should fill the blank?
GPT 3.5
The pattern in this series involves alternating between adding 4 and subtracting 3. Starting with 72, we add 4 to get 76, subtract 3 to get 73, add 4 to get 77, subtract 3 to get 74, and so on. Therefore, the number that should fill the blank in the series is obtained by adding 4 to the previous term, resulting in 75. Therefore, the number that should fill the blank is 75.