Show that at least four of any 22 days must fall on the same day of the week
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In a 22 days ,Let the starting day be Monday.
22 is expressible in the form of (7*3 + 1 )
All days ( Monday ...... Sunday) come for three times and one of them comes for the fourth time.
Hence, 4 of 22 days must fall on same day of the week
22 is expressible in the form of (7*3 + 1 )
All days ( Monday ...... Sunday) come for three times and one of them comes for the fourth time.
Hence, 4 of 22 days must fall on same day of the week
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