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Question Number 132174 by EDWIN88 last updated on 12/Feb/21
Commented by EDWIN88 last updated on 12/Feb/21
$$\mathrm{old}\:\mathrm{unswered} \\ $$
Commented by mr W last updated on 12/Feb/21
$$\frac{\mathrm{6}!}{\mathrm{2}!\mathrm{2}!}=\mathrm{180} \\ $$$${all}\:{answers}\:{are}\:{wrong}! \\ $$
Commented by benjo_mathlover last updated on 12/Feb/21
$$ \\ $$$$\mathrm{In}\:\mathrm{my}\:\mathrm{opinion}\:\mathrm{this}\:\mathrm{matter}\:\mathrm{is}\:\mathrm{not}\: \\ $$$$\mathrm{clear}\:\mathrm{whether}\:\mathrm{it}\:\mathrm{is}\:\mathrm{permissible}\:\mathrm{to} \\ $$$$\mathrm{use}\:\mathrm{only}\:\mathrm{part}\:\mathrm{of}\:\mathrm{the}\:\mathrm{letters}\:\mathrm{or}\: \\ $$$$\mathrm{should}\:\mathrm{all}\:\mathrm{letters}\:\mathrm{be}\:\mathrm{used} \\ $$