human
Mandy is 3 years old. Her brother is 4 times as old as she is. Her sister is 5 years younger than her brother. What is the age difference between Mandy and her sister?
assistant
How old is Mandy's brother? ** Mandy's brother's age is 3 years x 4 = <<3*4=12>>12 years old.
How old is Mandy's sister? ** Her sister's age is 12 years - 5 years = <<12-5=7>>7 years old.
What is the age difference between Mandy and her sister? ** The age difference between Mandy and her sister is 7 years - 3 years = <<7-3=4>>4 years.
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