$$\text { For all natural numbers } a \text { and } b , \operatorname { LCM } ( a , b ) \mid \operatorname { GCD } ( a , b ) \text {. }$$

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Q72: Solve the problem.<br>-If a group of 247

Q73: Without using a calculator, determine whether the

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Q77: Without using a calculator, determine whether the

Q78: Provide the appropriate response.<br>-What is the greatest

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