on what dates of January,1998 did we have friday
Answers
Given : dates of January,1998
To Find : on What dates we had Friday
Solution:
Lets check day on 1st January 1998 using ZELLER's Rule
ZEllER’S Rule Formula
F = K + [(13×M – 1)/5] + D + [D/4] + [C/4] -2C
K = 1 ( Date )
M = 11 ( as March is 1st month )
D = 97 ( 98- 1 = 97 as Jan & Feb are counted in previous year)
C = 19
F = 1 + [(13×11 – 1)/5] + 97 + [97/4] + [19/4] -2(19)
=> F = 1 + 28 + 97 + 24 + 4 - 38
=> F = 116
116 = 16 x 7 + 4
4
4 =THURSDAY
1st Jan 1998 is THURSDAY
Hence 2nd January 1998 FRIDAY
9th , 16th , 23rd & 30th Jan 1998 will also be Fridays
dates of January,1998 friday - 2 , 9 , 16 , 23 , 30
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