Respuesta :

23 because:

38 26 21 23
 -12 -5 2
   7 7

difference of 12, 5 and then 2 because between each one there is a difference of 7
im just guessing not too sure

Answer: The missing number should be 23.


Step-by-step explanation: Here, we can see that the difference between the consecutive terms are not equal, so, we have to apply some alternative technique to find the answer.

We have

38-26=12 and 26-21=5.

Also, 12-5=7

Therefore, 5-7=-2, and when we subtract -2 from 21, the result is 23.

Thus, the missing number is 23.


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