What number should replace the question mark in the sequence?
Correct answer: 18
Explanation:
The sequence is 30, 29, 27, 26, 24, 23, 21, 20, ?.
Look at how the numbers decrease:
30 - 1 = 29
29 - 2 = 27
27 - 1 = 26
26 - 2 = 24
24 - 1 = 23
23 - 2 = 21
21 - 1 = 20
The pattern is: subtract 1, then subtract 2, and repeat.
So the next step is:
20 - 2 = 18
Therefore, the missing number is 18.
Finall answer to this puzzle: 18
