Multiple choice

In the following number series, find the value of the missing term: 456.5, 407, 368.5, 341, 324.5, ?.

  1. 309

  2. 319

  3. 317

  4. 323

  5. 321
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The differences between consecutive terms are: 456.5 - 407 = 49.5, 407 - 368.5 = 38.5, 368.5 - 341 = 27.5, 341 - 324.5 = 16.5. The differences are decreasing by 11 each time (49.5, 38.5, 27.5, 16.5, 5.5). The next term is 324.5 - 5.5 = 319.

Keep practicing — related questions