Multiple choice

In the following number series, a term is wrong. Find the wrong term. 5.9 6 6.1 6.4 7.9 18.5 112.9

  1. 5.9

  2. 6

  3. 6.1

  4. 7.9

  5. 18.5
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

The pattern is: term + (0.1 × previous difference) where differences increase. Differences: 6-5.9=0.1, 6.1-6=0.1, 6.4-6.1=0.3, 7.9-6.4=1.5. Next difference should be 0.1×1.5=0.15, so 7.9+0.15=8.05. But the given term is 18.5. Checking further: if we use 18.5, the next difference is 18.5-7.9=10.6, and 10.6×0.1=1.06 gives 18.5+1.06=19.56, not 112.9. The term 18.5 violates the pattern.

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