NUMERUS BASIC - free IQ test

This is pretty elementary IQ test, but capable to estimate IQ up to 160 sd=15, which is 1/30.000 rarity.
Each solution should be given as an integer (eg. 3) or a fraction (eg. 3/2). If the solution is 3, then 3.0 is incorrect.
Hint: If you find more than one logical solution to a particular item, you must choose the most logical one.
Important: You will receive the most accurate score if you try the test no more than twice.

1) 1, 1, 1, 2, ?, 2


2) 1, 2, 4, 5, ?


3) -1, 5, 11, ?


4) 0.5, 2, ?, 32


5) 1, 3, 4, ?, 11


6) ?, 1, 3, 6, 10


7) 1, 10, 110, 1101, ?


8) 123, 354, 897, ?


9) 5, 10, 20, 35, ?


10) 2, 4, 12, ?, 72
11) 123, 451, ?, 512


12) 510001, 401010, 300200, ?


13) 11, 32, 54, 78, ?


14) 24, 16, 25, 66, ?, 36


15) 1/2, 3/4, 7/8, ?


16) 1/2, 3/2, 5/6, ?


17) 77, 49, 36, 18, ?


18) 135, 791, ?, 151


19) 138, 257, ?, 132


20) 123, ?, 789, 211101