Multiple choice

Directions: Identify the missing number in the series provided. 25, 65, 145, 265, 425, 625, ?

  1. 825

  2. 865

  3. 895

  4. 925

  5. 965
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The differences between consecutive terms are: 40, 80, 120, 160, 200. The next difference should be 240. Adding 240 to 625 gives 865.

AI explanation

The differences between the consecutive terms are 40, 80, 120, 160, and 200. This forms an arithmetic progression increasing by 40 each time, so the next difference is 240. Adding 240 to the last term gives 625 + 240 = 865. The result is 865.

Keep practicing — related questions