# If 7 November 2019 is a Thursday, then which of the following days will NOT be a Thursday?

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If 7 November 2019 is a Thursday, then which of the following days will NOT be a Thursday?
1. 28 November 2019
2. 5 December 2019
3. 14 November 2019
4. 30 October 2019

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Correct Answer - Option 4 : 30 October 2019

Given:

7 November 2019 = Thursday

The above given dates will not be Thursday only if the difference between the number of days between 7 November and the given date must not be a multiple of 7.

On checking each options one by one:

1) 28 November 2019 → 28 November - 7 November = 21 days. It is a multiple of 7. So, It will be Thursday.

2) 5 December 2019 → 5 December - 7 November = 35 days. It is a multiple of 7. So, It will be Thursday.

3) 14 November 2019  → 14 November - 7 November = 7 days. It is a multiple of 7. So, It will be Thursday.

4) 30 October → 7 November - 30 October = 9 days. It is not a multiple of 7. So, it will not be Thursday.

Hence, "30 October 2019" is the correct answer.