Only the question 1 was not answered, the question 16 was answered correctly, and three questions were typed incorrectly.

Xiao Ming got 100. If he didn't do anything wrong, he wouldn't get 100 (100 is not divisible by 7). In other words, Xiao Ming's answer is right or wrong. Then the correct answer should be greater than or equal to 15 (the correct answer should be more than 100, and then the wrong answer will be deducted), and it should be less than 20 (because all the answers are more than 100).

Then even if [7 * (___)- 100] ÷ 4, the number divisible at the same time plus the number filled in brackets is less than or equal to 20, which is the answer (15, 16, 17,17.