17
23
22
15
Answer is Right!
Answer is Wrong!
The missing number is 22.
The numbers in the sequence are all prime numbers, except for the missing number. The missing number must be a prime number that is greater than 17 and less than 23. The only prime number that fits this description is 22.
Here is a list of all the prime numbers less than 23:
2, 3, 5, 7, 11, 13, 17, 19, 23
As you can see, 22 is the only prime number that is greater than 17 and less than 23. Therefore, the missing number is 22.