Multiple choice

Find the missing term in the series: 9, 8, 15, ?, 175, 874

  1. 36

  2. 40

  3. 44

  4. 52

  5. 56
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pattern: 9 * 1 - 1 = 8. 8 * 2 - 1 = 15. 15 * 3 - 1 = 44. 44 * 4 - 1 = 175. 175 * 5 - 1 = 874. The missing term is 44.

AI explanation

The pattern multiplies the current term by an increasing integer and subtracts 1 to obtain the next term. For instance, (9 x 1) - 1 = 8, then (8 x 2) - 1 = 15, and subsequently (15 x 3) - 1 = 44. Continuing this pattern, (44 x 4) - 1 = 175 and (175 x 5) - 1 = 874, verifying the missing term is 44.

Keep practicing — related questions