16. What was the day of week on 1 April, 2001?

- Option : A
- Explanation : 1st April, 2001 = (2000 years + period from 1.1.2001 to 1.4.2001)

Odd days in 2000 years = 0

Now, calculate the odd days for the year 2001.91 divided by 7 gives 0 as remainder, so, odd days can be counted as 0.Jan Feb March April Total 31 28 31 1 91

Total number of odd days = (0 + 0) = 0

On 1st April, 2001, it was Sunday.

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17. The last day of a century cannot be

- Option : C
- Explanation : 100 years contain 5 odd days.

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 odd days that is, equal to 1 odd day.

Last day of 3rd century is Monday.

400 years contain 0 odd days.

Last day of 4th century is Sunday.

This cycle is repeated.

Last day of a century cannot be Tuesday or Thursday or Saturday.

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