Multiple choice

Find the missing term in the following number series. $122\,\,\,\, 213\,\,\,\, 340\,\,\,\, 509\,\,\,\, 726\,\,\,\, ?$

  1. $1012$
  2. $997$
  3. $1144$
  4. $1253$
  5. $1193$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The series follows n³-3 where n increases by 1: 5³-3=122, 6³-3=213, 7³-3=340, 8³-3=509, 9³-3=726. Next term is 10³-3=1000-3=997. Option B is correct.

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