27 जून 1980 ईस्वी को कौन-सा दिन था?

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DFCCIL Executive CBT1 Civil 25 Aug 2023 Shift 3 Official Paper
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  1. शुक्रवार
  2. बुधवार
  3. सोमवार
  4. मंगलवार

Answer (Detailed Solution Below)

Option 1 : शुक्रवार
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Detailed Solution

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दी गई तिथि: 27 जून 1980

वर्ष विषम दिन
100 5 विषम दिन
200 3 विषम दिन
300 1 विषम दिन
400 0 विषम दिन

अब,

1979 तक → 1600 + 300 + 79

अधिवर्ष 2 विषम दिन
साधारण वर्ष

1 विषम दिन

1600 वर्षों में विषम दिन 0 है,

300 वर्षों में विषम दिन 1 है,

79 वर्षों में (19 अधिवर्ष और 60 साधारण वर्ष) विषम दिन 19 × 2 + 60 × 1 = 38 + 60 = 98 विषम दिन हैं,

⇒ 0 + 1 + 98

⇒ 99 विषम दिन।

और, 1 जनवरी 1980 से 27 जून 1980 तक:

⇒ 31(जनवरी) + 29(फरवरी, 1980 एक अधिवर्ष है) + 31(मार्च) + 30(अप्रैल) + 31(मई) + 27(जून) = 179 दिन।

कुल विषम दिन → 99 + 179 = 278 दिन = 278/7 = 39 सप्ताह और 5 विषम दिन।

→ 5 शुक्रवार को दर्शाता है।

इसलिए, 27 जून 1980 को शुक्रवार है।

इसलिए, सही उत्तर "शुक्रवार" है।

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