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Formulae Substitution

Welcome, welcome, benvenuti to Luigi"s Lunch Lounge, or should I say: svaga hai to Taj"s Indian delicacies. You have entered the Waiter/Waitress of the Year competition. As part of the selection process you will need to be quick at taking customer"s orders. A friendly tip, if three people all want beef byriani, better to write 3b, for short. The second stage of the selection procedure requires you to very quickly calculate...

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