Solving An Age Problem with Basic Math
Janet and younger brother Jared are 5 years apart. In age the sum of their ages is 13. How old is each.
Trial and error
13 = 12 + 1 The difference is 11
13 = 11 + 2 The difference is 9
13 = 10 + 3 The difference is 7
13 = 9 + 4 The difference is 5
So 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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Jul 03, 20 09:51 AM
factoring trinomials (ax^2 + bx + c ) when a is equal to 1 is the goal of this lesson.
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