Multiple choice

A series is given with one term missing. Choose the correct alternative from the given options that will complete the series. $13, 6.5, 6.5, 9.75, (?)$

  1. $18.50$
  2. $19.50$
  3. $21.50$
  4. $23.50$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The pattern alternates: ÷2, ×1, ×1.5, ×2. 13÷2=6.5, 6.5×1=6.5, 6.5×1.5=9.75, 9.75×2=19.5. The multipliers increase: 0.5, 1, 1.5, 2.

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