1, 2, 3, 6, 9, 18, ?, 54

Solution (By Examveda Team)

Let's break down this number series question!

The series is: 1, 2, 3, 6, 9, 18, ?, 54

Look for a pattern. It's not a simple addition or subtraction.

Notice this:
1 + 2 = 3
3 + 6 = 9
9 + 18 = ?

It looks like each number is the sum of the two numbers before it.

So, to find the missing number: 9 + 18 = 27

Therefore, the missing number is 27. The correct answer is B.

Double-check: 18 + 27 = 45 (Incorrect so that Logic is wrong)

Notice this new Logic:
1 x 2 = 2
2 x (3/2) = 3
3 x 2 = 6
6 x (3/2) = 9
9 x 2 = 18
18 x (3/2) = ?
So, to find the missing number: 18 x (3/2) = 27
Then check it with the next number: 27 x 2 = 54

Therefore, the missing number is 27. The correct answer is B.