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Lesson 3 of 4 · Number series: missing / wrong term

Square cube

Series (number / letter / alphanumeric) · for IPMAT Indore, IPMAT Rohtak and JIPMAT · asked in JIPMAT 2023

The exam method

  1. Recognise landmarks. 24, 120, 720 are factorials; 121, 169, 289 are prime squares; 8, 27, 125, 343 are cubes of primes. The series is then that sequence plus a small counter.

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