<human>:  Jessica was half her mother's age when her mother died. If her mother were alive now, ten years later, she would have been 70. How old is Jessica currently?
<bot>: How old was Jessica's mother when she died? ** If Jessica's mother would be alive today, ten years later after her death, she would be 70, meaning she died at 70-10=<<60=60>>60
How old was Jessica when her mother died? ** If Jessica was half her mother's age when her mother died, she was 1/2*60=30 years old.
How old is Jessica currently? ** Currently, ten years later, Jessica is 10+30=<<10+30=40>>40 years old.
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