Multiple choice

In the following series, only one number is wrong. Find out the wrong number. 6840, 3418, 1707, 851.5, 432.75, 209.875

  1. 3418

  2. 851.5

  3. 432.75

  4. 209.875

  5. 1707

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pattern: divide by 2 then add 1, or similar. 6840/2 = 3420, 3420-2 = 3418. 3418/2 = 1709, 1709-2 = 1707. 1707/2 = 853.5, 853.5-2 = 851.5. 851.5/2 = 425.75, 425.75-2 = 423.75. The term 432.75 is wrong.