2.6.12.20,30,42, (56). The 98th (?)

98*99=9702

RELATED INFORMATIONS

1. Question 1 11, 9 7, 9 13, 8 5、 4 4、4 3、（ )
2. Question 1: 1, 2, 2, 4, 3, 8, 4, 16, 5, (), () Question 2: 1, 3, 8, 21, ()
3. 0,1,3,5,8,13,55 ,（） ,（）
4. 2 5 6 7 11 8 10 ( ) 4 18 6 10 12 9 20 2 6 7 11 4 4 4( ) 1 4 3 5 5 6 4 2 6 7 11 4 4 4( ) 1 4 3 5 5 6 4 7 4 6 8 4 8 6 5( ) Problem solving method
5. 10 23 18 6 3 6 8 9 11 10 6 20 7 9 X 18 7 7 15 26 Cross a group, ask x should fill in what? What's the rule? --10 3-6-8 --7 --23 9-11-10 --7 --18 6-20-7 --15 --6 9-X-18 --26
6. A.1000,970,200,180,40,30,( ),( ) B.0,1,3,8,21,55,( ),( ) C.1,2,5,13,34,89,( ),( )
7. Observe the rule of a group of numbers 0, 3, 8, 15, 24. The number 2009 is? The number n is? Its term is?
8. Observe the law of the following series of numbers: 0,3,8,15,24. The number 2008 is -- the number n is-
9. Observe the law of the following numbers 0,3,8,15,24... Then the hundredth number is?
10. Mathematics problem of the first day of junior high school: look at the law of 0, 3, 8, 15, 24, 35, ---- this group of numbers, what is the 100th? What is the nth?
11. 100,98,96,102,92,106,（）,（）.
12. A string of numbers is arranged according to the following rule, so what is the 50th number? 1 2 3 2 3 4 3 4 5 4 5 6
13. 8 7 6 2 2 () fill in the blanks
14. What is the weight per meter of steel bars 25, 22, 20, 18, 16, 12, 10 and 8?
15. 20.20.10, 18.16.8, 25. (). (), what do you fill in the brackets?
16. Find the rule and fill in {20,20,10} {18,16,8} {25, (), ()}
17. 0 39 24 63 () to find the law What is the number in the last bracket?
18. What is the law of 3,6,9,15,24, (), 63, ()
19. 3.6.9.15.24. (). 63. ()
20. ( )：16=8\3=( ）÷24