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Age

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by ricky » Tue Aug 05, 2008 5:24 am
Jane and Bob are currently x and 13 years old, respectively, where x is an integer. If Jane is older than Bob, what is the minimum value of x such that the sum of Jane's and Bob's ages has a units digit that is greater than the units digit of Bob's age?
11
14
17
18
21
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Source: — Problem Solving |

by sudhir3127 » Tue Aug 05, 2008 5:30 am
i would go with 14.. just plug in u will get it ...
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by ricky » Tue Aug 05, 2008 5:32 am
But why not 11?
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by sudhir3127 » Tue Aug 05, 2008 5:34 am
because jane should be older than Bob..

If Jane is older than Bob............
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