Sabir remembers that his brother's birthday is after the fifteenth but before the eighteenth of february and his sister Rabia remembers that her brother's birthday is after the sixteenth but before the nineteenth of February. On which day in February is Sabir's brother's birthday?

Answer: 17
Explanation

Sabir's brother's birthday is the 16th and 17th of Feb 

Rabia's brother's birthday is the 17th and the 18th Feb 17th is common in both birthday

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