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Christina makes tasty toast in a small pan. After toasting one side of a slice, she turns it over. Each side takes 30 seconds. The pan can only hold two slices.
How can she toast both sides of three slices in 1 & 1/2 instead of 2 minutes?View SolutionSubmit Solution- 7.8K views
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There is one four-digit whole number n, such that the last four digits of n2 are the original number n
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You throw me out when you want to use me and you take me in when you don\’t want to use me.
Who Am I?
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