Question 788866
Any multiple of {{{ 5 }}} must end in {{{ 0 }}}
or {{{ 5 }}}
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The number preceding any multiple of {{{ 5 }}}
must end in {{{ 4 }}} or {{{ 9 }}}
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Any number ending in {{{ 9 }}} cannot be 
a multiple of {{{ 8 }}}
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Therefore, this year must end in {{{ 4 }}}
{{{ 24 = 3*8 }}}
Next year will be {{{ 25 = 5*5 }}}
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This must be the right choice, since
{{{ 4*8 = 32 }}} and
{{{ 33 }}} is not a multiple of {{{ 5 }}}
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{{{ 5*8 = 40 }}} -too old
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In {{{ 6 }}} years you will be {{{ 24 + 6 = 30 }}}