9 19 40 83 ? 345 696

In each of the following questions , identify the wrong number in the series . 9, 19, 40, 83, 170, 340

What will come in the place of the question mark ‘?’ in the following question? 39.57 + 56.83 – 19.31 × 4 + 7.84 = ?

If sin theta =40//41 , then cot theta is A. 40/9 B. 9/40 C. 9/41 D. 41/9

9 2/3+=19