exam Maths Puzzle Numerical Ability

This is a work problem--"A plane that carries mail makes a round trip each day from Chicago to New York. It makes 3 intermediate stops on the way to New York and 1 intermediate st

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exam Other Question
A manufacturer produces two models of the same toy, Model A and Model B. Model A takes 4 hours to produce and costs $8 each. Model B takes 3 hours to produce and costs $7 each. I ok there is this extremely hard question for our class extra credit so here it goes.....
9821734682123457(squared)+2*18927365=819723568917469567