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ICSE Class 10 Answered

If 09/12/2001 happens to be Sunday, then 09/12/1971 would have been at (1) Wednesday (2) Tuesday (3) Saturday (4) Thursday
Asked by khushdab | 12 Nov, 2020, 04:37: PM
answered-by-expert Expert Answer
09/12/2001 is Sunday..... given 
 
We know that, every year has 365 days means 1 odd day and
in the leap year has 2 odd days as the number of day are 366.
 
No. of days between 9/12/71 and 9/12/2001:
 
Here, No. of normal years= 22 and no. of leap years =8
 
 So, odd days =22+16 =38 i.e 3 odd days(remainder when 38 is divided by 7,i.e. 3)

Hence,  it was a Thursday on the date 09/12/1971.
Answered by Yasmeen Khan | 18 Nov, 2020, 03:49: PM

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