9
4
0
1
Answer is Wrong!
Answer is Right!
The missing number is 1.
The numbers in the sequence are all the numbers from 1 to 9, except for 1.
A. 9 is not the missing number because it is already in the sequence.
B. 4 is not the missing number because it is not in the sequence.
C. 0 is not the missing number because it is not in the sequence.
D. 1 is the missing number because it is not in the sequence, but it is a number from 1 to 9.