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First, look for a factor. The most obvious would be 5, because the number ends in a five, so must be divisible by 5.

65/5 = 13, so the other factor will be 13.

So

65

/ \

5 13

and since both 5 and 13 are prime numbers, the tree can't go on any further.

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10y ago
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Q: How do you make a factor tree for 65?
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