Show:
Numbers
What's missing?
Addition
Subtraction
Shapes
100

7

7
100

1, 2, 3, ?

4

100

1 + 2

3

100

1 - 1

0

100

What shape has no sides?

Circle

200

13

13

200

8, 9, 10, ?

11

200

3 + 2

5

200

2 - 1

1

200

What shape has 3 sides?

Triangle

300

20

20

300

17, 18, ?, 20

19

300

7 + 2

9

300

5 - 3

2

300

What shapes have 4 sides?

Square and rectangle

400

47

47

400

31, 32, ?, 34, 35

33

400

8 + 10

18

400

7 - 4

3

400

What shape has 6 sides?

Hexagon

500

89

89

500

79, ?, 81, 82

80

500

10 + 10

20

500

15 - 5

10

500

How many corners does a circle have?

0