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18 July, 21:57

Colin was thinking of a number. Colin adds 18 to it, then doubles it and gets an answer of 65.5. What was the original number?

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  1. 18 July, 22:13
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    Do those steps in reverse to figure out the number.

    65.5 : 2 = 32.75.

    32.75 - 18 = 14.75.
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