Explanation:

Let’s dig into this sequence: 6, 6, 8, 24, 28, 140, ?

- Start at the first two numbers: 6, 6. No change.

- Next, 6 to 8. That’s +2.

- 8 to 24. That’s ×3.

- 24 to 28. That’s +4.

- 28 to 140. That’s ×5.

Now, notice a pattern:

- Add 2, ×3, add 4, ×5, ...

- The adds increase by 2 each time: +2, +4, so next should be +6.

- The multiplies go up by 2 each time: ×3, ×5, next would be ×7.

Here are the steps:

- After 28 and ×5, we got 140.

- Next operation should be +6: 140 + 6 = 146.

? Option 2, 146, is the answer.

Options in context:

- 144: That would be +4, already used.

- 145: Not from this pattern.

- 146: This fits perfectly.

- 148: Doesn’t fit the pattern.