What's the missing number?
7
What's the missing number?
25
What's the missing number?
8
Which number is even?
6
What's the missing number?
7
What's the missing number?
12
Which number is odd?
3
What's the missing number?
18
Which number is even?
12
What's the missing number?
21
Which number is odd?
9
What's the missing number?
12