Explanation:

Let’s break down the sequence:

40, 20, 20, 30, 60, ?

- Start with 40. Divide by 2, you get 20.

- Stay at 20 for the next number.

- Then, add 10 (20 + 10 = 30).

- Next, multiply by 2 (30 × 2 = 60).

So, what happens next?

- If you look closely, the pattern alternates:

* Divide by 2 ? Same number ? Add 10 ? Multiply by 2

- Following that rhythm, after multiplying by 2 (60), the next logical step is “repeat the same number.”

- So, ? = 60.

Let’s see if it matches the options:

1. 125

2. 120

3. 150

4. 160

5. None of these

None of these options is 60, which means...

Option 5: None of these is the right answer.

- The correct option is Option 5: None of these.

- The pattern is pretty simple, but tricky if you blink: divide, repeat, add, multiply, repeat.

- 60 fits, not 150.

- This is a good example of how tiny changes can trip you up!