Logical puzzle answers (from "Kids stuff"):
1. 13 (add 4 each time)
2. 11 (uneven number)
3. Circle (the other shapes have straight sides)
4. 15 and 2 (15 x 2 = 30)
5. 2 (2 + 4 = 6, 6 / 2 = 3)
6. 5, 9, 6
7. 21
8. 18
9. Add a stroke to make the first + sign a 4, then you get 545 + 5 = 550
10. 1 3 1 1 2 2 2 1 (each line is a verbal description of the line above turned into
numbers. Try reading them out: line one reads "One 1", line three reads "Two 1s",
and so on, up to the final line, "One 3, One 1, Two 2s, Two 1s")