1.) Megan had a sum of money. She spent $154 on a mobile phone and 2/5 of the remainder on a watch. After that, she had 1/4 of her original sum left. How much money did she have at first?
2.) Leslie bought some sugar. She used 1.8 kg of sugar to bake cookies and 1/6 of the remainder to make cupcakes. She then had 1/3 of the sugar left. Find the mass of sugar she bought.
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