<human>:  Geb is 10 less than half the age of Haley. If Haley is 26 years old, how old is Geb?
<bot>: How old is Haley? ** Half of Haley's age is 26/2 = <<26/2=13>>13.
How old is Geb? ** So Geb is 13 - 10 = <<13-10=3>>3 years old.
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