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What approximate value should come in place of the question mark ‘?’ in the following question? 

(1800 + √? × 29.99) ÷ 15.02 = 144

  1. 12
  2. 25
  3. 625
  4. 144
  5. 196

Answer (Detailed Solution Below)

Option 4 : 144
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Detailed Solution

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Approximating the numbers in the above expression:

⇒ (1800 + √? × 30) ÷ 15 = 144

⇒ 1800 + √? × 30 = 144 × 15 = 2160

⇒ √? × 30 = 2160 – 1800 = 360

⇒ √? = 360/30 = 12

∴ ? = 122 = 144

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Last updated on Jul 2, 2025

-> IBPS SO Notification 2025 has been released on 30th June 2025 on the official website, Institute of Banking Personnel Selection. 

-> As per the latest Notice, the IBPS SO Online application process begins at 1st July 2025. All the aspiring candidates are suggested to submit their application form on time. 

-> According to the new exam calendar, the prelims examination is scheduled for 30th August 2025. While the IBPS SO Mains Examination is scheduled for 9th November 2025. 

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