Which term is incorrectly placed in the following number series: 140, 340, 540, 730, 940, 1140?

(A) 830
(B) 730
(C) 1060
(D) 550

🧠 Explanation:

  • The given number series is: 140, 340, 540, 730, 940, 1140.
  • Let’s examine the pattern of differences between the terms:
    340 − 140 = 200
    540 − 340 = 200
    730 − 540 = 190 ❌
    940 − 730 = 210
    1140 − 940 = 200
  • All terms increase roughly by 200, except for the jump from 540 to 730, which is only 190 — this breaks the pattern.
  • Therefore, 730 is the incorrectly placed term in the series, making option B the correct answer.