Wrong term in a geometric series (x2, x3, x4)

This type of question, asked 3 times: 19 Sep 2025 S1, 19 Sep 2025 S2, 24 Sep 2025 S3. All 3 questions below, oldest first.

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Question 1
19 Sep 2025 S1
25 $The series given below contains a sequence of numbers. Accordingly identify the incorrect combination.3 , 12 , 48 , 194 , 768 , 3074$
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Question 2
19 Sep 2025 S2
25 $The series given below contains a sequence of numbers. Accordingly identify the incorrect combination.9 , 17 , 36 , 72 , 144 , 288$
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Question 3
24 Sep 2025 S3
16 $Which number does not belong? 2, 6, 18, 54, 162, 325$
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Question 1