Sq root of big number : Perfect squares ending in 25 & 36


Trick : āĻ•ā§ŒāĻļāĻ˛ : Valid only for perfect squares ending in 25.


√9025 = ?



  • Last two digits 25 → Answer ends with 5.

  • Remaining number = 90

  • 9 × 10 = 90

  • Take the smaller number = 9

  • Write 5 at the end.


Ans = 95






Trick: āĻ•ā§ŒāĻļāĻ˛ : Valid only for perfect squares ending in 36.


Q. √8836 = ?


Options / āĻŦāĻŋāĻ•āĻ˛ā§āĻĒāĻ¸āĻŽā§‚āĻš: A) 92  B) 94  C) 96  D) 98


Trick | āĻ•ā§ŒāĻļāĻ˛



  • Last digit 6 → Answer ends with 4 or 6.

  • Ignore the last two digits.

  • Find the nearest smaller perfect square (here, 81 = 9²).

  • Try the two possible numbers (94 or 96). The correct one is 94.


Ans: B) 94






 

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