Multiple choice

Directions: Find the missing term in the given series. 111, 221, 441, 881, ?, 3521

  1. 1760

  2. 1761

  3. 1759

  4. 1758

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The pattern is: 111*2 - 1 = 221; 221*2 - 1 = 441; 441*2 - 1 = 881. Following this, 881*2 - 1 = 1762 - 1 = 1761. Checking the next term, 1761*2 - 1 = 3522 - 1 = 3521, which matches.

AI explanation

The differences between the consecutive terms are 110, 220, and 440, which forms a geometric progression where each difference is doubled. The next difference in this pattern is 880, and adding 880 to 881 gives 1761. This is confirmed because adding 1761 and 1760 yields 3521.

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