Instructions
Each of the questions follows definite pattern. Observe the same and fill in the blanks with suitable answers.
Solution
The logic here is
12 - 6 = 6
20-12 = 8
30-20 = 10
The difference between the consecutive numbers is increasing by 2.
The next difference should be 12.
$$\therefore\ $$The missing number is 30+12 = 42
Hence, the correct answer is Option D
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