Multiple choice general knowledge math & puzzles

Look at this series: 1.5, 2.3, 3.1, 3.9, ... What number should come next?

  1. 4.2

  2. 4.4

  3. 4.7

  4. 5.1
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is an arithmetic progression where each subsequent number is found by adding 0.8 to the previous term. 1.5 + 0.8 = 2.3; 2.3 + 0.8 = 3.1; 3.1 + 0.8 = 3.9. Therefore, 3.9 + 0.8 = 4.7.

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