Multiple choice

Which number would replace underline mark in the series?1, 6, 26,_____, 426.

  1. 86

  2. 76

  3. 106

  4. 96
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The pattern is x*5+1: 1*5+1=6, 6*4+2=26, 26*3+3=81 (incorrect). Let's try another: 1*5+1=6, 6*4+2=26, 26*4+2=106, 106*4+2=426. The pattern is multiplying by 4 and adding 2.

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