उस विकल्प का चयन कीजिए जो पाँचवें पद से उसी प्रकार संबंधित है जैसे दूसरा पद, पहले पद से संबंधित है और चौथा पद, तीसरे पद से संबंधित है।

121 ∶ 10 ∶ 256 ∶ 15 ∶∶ 441 ∶ ?

This question was previously asked in
SSC CGL 2023 Tier-I Official Paper (Held On: 18 Jul 2023 Shift 4)
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  1. 17
  2. 20
  3. 21
  4. 19

Answer (Detailed Solution Below)

Option 2 : 20
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दिया गया है:

121 ∶ 10 ∶ 256 ∶ 15 ∶∶ 441 ∶ ?

तर्क: पहली संख्या = (दूसरी संख्या + 1)2

121 : 10

⇒ (10 + 1)2

⇒ (11)2 = 121

256 : 15

⇒ (15 + 1)2

⇒ (16)2 = 256

इसी प्रकार, '441 : ?' के लिए

⇒ (x + 1)2 = 441

⇒ (x + 1) = 21

x = 20

यहाँ, '441 : 20' सही युग्म है।

अतः सही उत्तर "विकल्प (2)" है।

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