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MediumDGVCL Vidyut Sahayak JE (Electrical)2024
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A three-digit number 2y5 is divisible by 11. Find the value of digit y.

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Answer & Explanation
Correct AnswerD. 7

Quick Explanation

For divisibility by 11, (sum of alternate digits difference) must be 0 or multiple of 11. (2 + 5) - y = 0, so y = 7.

Formula / Key Relation

(2+5)-y=0

Detailed Explanation

For divisibility by 11, (sum of alternate digits difference) must be 0 or multiple of 11. (2 + 5) - y = 0, so y = 7.

Quick Trick

Use the standard formula directly after identifying the quantities.

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