<human>:  Ali turned 8 years old this year, and is now 3 years older than Yusaf. If Umar is twice Yusaf’s age, how old is Umar?
<bot>: How old is Yusaf? ** If Ali is 3 years older, then Yusaf must be 8 – 3 = 5 years old.
How old is Umar? ** Umar is twice Yusaf’s age, so he must be 5 * 2 = <<2*5=10>>10 years old.
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