Continue the Sequences

1. 1189, 841, 594, 420, 297, 210, 148
   (dimensions of successive A-series paper sizes – alternate sequences halve and round down)
2. 4, 9, 25, 49, 121, 169
   (squares of successive prime numbers)
3. 3, 14, 39, 84, 155
   (x + x² + x³ for successive x)
4. 1, 2, 4, 8, 16, 77, 154, 605, 1111
   (reverse the digits and add)
5. 3, 3, 5, 4, 4, 3, 5, 5, 4
   (number of letters in one, two, three, four, …)