SSC-IMD-SA-REASONING-MOCK-02 – Question 21

Question:

Find the next number that logically replaces the question mark (?):
2, 12, 36, 80, ?

तार्किक रूप से प्रश्न चिह्न (?) को बदलने वाली अगली संख्या ज्ञात कीजिए:
2, 12, 36, 80, ?

Options:

  • 150
  • 140
  • 180
  • 120
  • 150
  • 140
  • 180
  • 120

Correct Answer: a)

Explanation:

Pattern follows \(n^3 + n^2\):
– \(1^3 + 1^2 = 1 + 1 = 2\)
– \(2^3 + 2^2 = 8 + 4 = 12\)
– \(3^3 + 3^2 = 27 + 9 = 36\)
– \(4^3 + 4^2 = 64 + 16 = 80\)
– \(5^3 + 5^2 = 125 + 25 = 150\).

पैटर्न \(n^3 + n^2\) पर आधारित है:
– \(1^3 + 1^2 = 2\)
– \(2^3 + 2^2 = 12\)
– \(3^3 + 3^2 = 36\)
– \(4^3 + 4^2 = 80\)
– \(5^3 + 5^2 = 125 + 25 = 150\)। अतः उत्तर 150 है।

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