Question 1137360
James is {{{ 8 }}}
Humphrey is {{{ 2*8 = 16 }}}
Jenny is {{{ 8 - 2 = 6 }}}
Mark is {{{ 6 - 2 = 4 }}}
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Humphrey is the oldest
Mark is the youngest
He is {{{ 4 }}}
Jenny is {{{ 16 - 6 = 10 }}} yrs
younger than Humphrey