Pratap correctly remembers that his mother's birthday is before 23rd April but after 19th April, whereas his sister correctly remembers that their mother's birthday is not on or after 22nd April. On which day in April is definitely their's mother's birthday?
Correct Answer: 20th or 21st
Explanation:
Days by Pratap - [20,21 or 22] in April
Days by his sister, not on or after 22 April
Clearly, the answer is [20 or 21] in April.
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