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  • The last day of the century cannot be?a) Wednesdayb) Monday c) Saturdayd) Sunday?

The last day of the century cannot be?a) Wednesdayb) Monday c) Saturdayd) Sunday?

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100 years contain 5 odd days.
herefore The last day of 1st century is Friday.
    200 years contain (5*2) ≡ 3 odd days.
∴ Last day of 2nd century is Wednesday.
300 years contain (5*3) = 15 equiv 1  odd day.
∴ Last day of 3rd century is Monday.
400 years contain 0 odd day.
∴ Last day of 4th century is Sunday.
This cycle is repeated.
∴ Last day of a century cannot be Tuesday or Thursday or Saturday.

Posted by

Deependra Verma

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