If 21st March 2021 was a Sunday, then what will be the day on 12th January 2022?

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RRB NTPC CBT 2 (Level-3) Official Paper (Held On: 17 June 2022 Shift 2)
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  1. Wednesday
  2. Monday
  3. Sunday
  4. Friday

Answer (Detailed Solution Below)

Option 1 : Wednesday
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Detailed Solution

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Given : 21st March 2021 was a Sunday.

  • Total number of days in a normal year = 365 
  • Number of odd days in a normal year = 365/7 = 1 
  • Total number of days in a leap year = 366
  • Number of odd days in a leap year = 366/7 = 2 
  • Total number of days from 21st March 2021 to 12th January 2022  = 10(March) + 30(April) + 31(May) + 30(June) + 31(July) + 31(August) + 30(September) + 31(October) + 30(November) + 31(December) + 12(January) = 297  
  • Since, it was Sunday on  21st March 2021, every 7th day from 21st March  will be a Sunday.
  • Thus, no. of odd days from 21st March 2021 to 12th January 2022 = 297/7 = 3
  • Now, 21st March 2021 + 3 odd days = 12th January 2022 ( Wednesday)
  • Thus, 12th January 2022 will be Wednesday.

Hence, "option 1" is the correct answer.

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