4/19/10

Test 7 Section 3 - #17 (page 773)

See variables, think PLUG-IN, sometimes even in the grid-in section!  Pick 3 prime numbers greater than 2:

3, 5, 7

Now just do what the problem asks: 3 x 5 x 7 = 105.  How many factors does 105 have (including 1 and 105)?

1 x 105
3 x 35
5 x 21
7 x 15

Any more?  Nope.  That's 8 factors.

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