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  • Number Series Completion
  • Directions: Choose the correct number from the given opti...
Multiple choice

Directions: Choose the correct number from the given options and fill in the next number in the series given below.

5, 11, 21, 43, 85, ____

  1. 170

  2. 121

  3. 271

  4. 171

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

The numbers are doubled and then one is added and subtracted, alternatively. 

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