you can beat me only if you are smarter than me

On tuesday was three days before my birthday party. But my mother whould only let me throw my party at weekends so I organise my party on the 24th. On 24th whould be 16 days after my birthday.Today is 20th. 5 years before I was as old as my brother is now but my brother was 16 years younger than my father who is 63 years old. Today my brother is 21 years older than my ex. Who's 43 years younger than my father.