Which word does not belong to the group?
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29th February 2000
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29th April 1998
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31st June 1999
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31st August 1997
February 29, 2000, April 29, 1998, and August 31, 1997 are all valid, existing dates. June 31, 1999 is impossible because June has only 30 days - there is no 31st day of June in any year. This is a calendar validity question testing knowledge that April, June, September, and November have 30 days, while the rest have 31 (except February).
To answer this question, we need to identify the word that does not belong to the group. Let's analyze each option:
Option A) 29th February 2000 - February 29th only occurs in leap years, which happen every four years. This date is valid and belongs to the group of possible dates.
Option B) 29th April 1998 - April 29th is a valid date and belongs to the group of possible dates.
Option C) 31st June 1999 - June only has 30 days, so there is no 31st of June. This date is not valid and does not belong to the group.
Option D) 31st August 1997 - August has 31 days, so the 31st of August is a valid date and belongs to the group.
The correct answer is C) 31st June 1999. This option does not belong to the group because there is no 31st of June.