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What is the next number?
Fill in the blanks
What is the core?
What is the pattern rule?
100

2, 4, 6, 8, 10, __

12 

100

5, 6, __, 8, 9

7

100

 X X O O X X O O X X O O 

X X O O 

100

6, 8, 10, 12, 14

Start at 6, add by 2

200

5, 10, 15, 20, 25, ___

30 

200
X, Y, X, Y, X, Y, __, Y 

X

200

1, 5, 2, 1, 5, 2, 1, 5, 2

1, 5, 2 

200

10, 20, 30, 40, 50 

Start at 10, add 10 each time

300

3, 6, 9, 12, ___

15

300

10, 20, 30, __, 50 

40

300

M U R M U R M U R M U R 

M U R

300

6, 9, 12, 15, 18, 21 

Start at 6, add 3 each time

400

18, 20, 22, 24, __

26
400

P C P S P __ P S P C P S

C 

400
fa la la la la fa la la la la fa la la la la 

fa la la la la

400

100, 105, 110, 115, 120 

Start at 100, add by 5

500

6, 12, 18, 24, __

30

500

12, 16, ___, 24, 28

20

500

Banana, Banana, Meatball, Banana, Banana, Meatball

Banana, Banana, Meatball

500

20, 19, 18, 17, 16, 15

Start at 20, take away one each time