以下每一個數學式皆猜一個四字成語

1. 5, 10
2. 1, 2, 3, 4, 5
3. 1, 2, 3, 4, 5, 6, 0, ＿, 9
4. 1, 1, 1, 6, 6, 6, 11, 11, 11, 16, 16, 16, ...
5. ＿, 2, 3, 4, 5, 6, 7, 8, 9, ＿
6. 2, 4, 6, 8, ...
7. 1, 2, 4, 3

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