Solution: Because 3+3=6,

6+3=9,

Verification: 9+3= 12,

Because, 1x2 = 2,

2×2=4,

So 4×2=8,

Verification: 8×2= 16,

So the answer is: 9; eight

Find a pattern to fill in the blanks: 1, 1, 2, 3, 5, 8, 13,-,34,-.

Solution: 8+13 = 21;

2 1+34=55;

The number to be filled in is 2 1 55.

So the answer is: 2 1 55.

17. Find a rule to fill in numbers:

12,23,34,55,86,——。

79, 1 010,811,112,-.Solution: (1), because/.

2+3=5,

So 5+8= 13,

So it should be:137;

(2) Because 7+3= 10,

10-2=8,

8+3= 1 1,

So 1 1-2=9,

So it should be 9 13,

So the answer is:137; 9 13..(2009? Jiyuan) find a rule to fill in the numbers.

23468,—1624. Solution: The required quantity is:

6×2= 12;

Verification:12× 2 = 24;

So, the answer is: 12. Find a rule to fill in the numbers. 5,6,11,17,28,-73. Solution:17+28 = 45;

Verification: 28+45 = 73.

So the answer is: 45.