If Pam is currently twice as young as Rena is, and in 10 years Rena will be 5 years older than her, how old is Pam now?
If Rena will be 5 years older than Pam in 10 years, this means they have a 5 year age gap.
Therefore, to be twice Pam's age, Rena would have to be 5*2=<<5*2=10>>10 years old.
This means that Pam is currently 10-5= <<10-5=5>>5 years old.
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