5-అంకెల సంఖ్య 676xy 3, 7 మరియు 11 ద్వారా భాగించబడితే, (3x - 5y) విలువ ఎంత?

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SSC CGL 2020 Tier-I Official Paper 1 (Held On : 13 Aug 2021 Shift 1)
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  1. 9
  2. 11
  3. 10
  4. 7

Answer (Detailed Solution Below)

Option 1 : 9
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ఇవ్వబడినవి:

676xy 3, 7 & 11 ద్వారా భాగించబడుతుంది

కాన్సెప్ట్:

676xy 3, 7 &11 ద్వారా భాగించబడినప్పుడు, అది 3, 7 &11 యొక్క క.సా.గు ద్వారా కూడా భాగించబడుతుంది.

విభాజ్యము= భాజకము × భాగహారలబ్ధము + శేషం

లెక్కింపు:

క.సా.గు (3, 7, 11) = 231

అతిపెద్ద 5-అంకెల సంఖ్య 67699 తీసుకొని దానిని 231తో భాగించండి.

∵ 67699 = 231 × 293 + 16

⇒ 67699 = 67683 + 16

⇒ 67699 - 16 = 67683 (పూర్తిగా 231తో భాగించబడుతుంది)

∴ 67683 = 676xy (ఇక్కడ x = 8, y = 3)

(3x - 5y) = 3 × 8 - 5 × 3

⇒ 24 - 15 = 9

∴ అవసరమైన ఫలితం = 9

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