Directions: Select the missing number that logically completes the given sequence.
12, 21, 30, 39, ?
Correct Answer :
48
Solution :
The correct option is 48.
To find the missing number, let us analyze the common difference between consecutive numbers in the given sequence:
21 - 12 = 9
30 - 21 = 9
39 - 30 = 9
The sequence increases by a constant difference of 9 at each step.
To find the missing term, add 9 to the last given number (39):
39 + 9 = 48
Therefore, the missing number that logically completes the sequence is 48.
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