What is the least number to be added to 6598 to form a perfect square?

This question was previously asked in
WBSSC Group D Official Paper (Held On: 19 Feb, 2017)
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  1. 124
  2. 116
  3. 126
  4. 112

Answer (Detailed Solution Below)

Option 3 : 126
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Detailed Solution

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Given:

Number = 6598

Formula used:

The next perfect square = Next integer of √N2

Additional number to make it a perfect square = (Next perfect square - N)

Calculations:

⇒ √6598 ≈ 81.2

⇒ Next integer = 82

⇒ Next perfect square = 822 = 6724

⇒ Additional number = 6724 - 6598

⇒ Additional number = 126

∴ The correct answer is option (3).

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