Janet and younger brother Jared are 5 years apart. The sum of their ages is 13. How old is each?Solution by Trial and error13 = 12 + 1 The difference is 1113 = 11 + 2 The difference is 913 = 10 + 3 The difference is 713 = 9 + 4 The difference is 5So they must be 9 and 4 years old.Since Jared is the younger brother, he is 4.Then, Janet is 9.
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