If M is the least common multiple of 90, 196, and 300, which of the following is NOT a factor of M?
600
700
900
2,100
4,900
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90=2x3x3x5 196=2x2x7x7 300=2x2x3x5x5 最小公倍数=2x2x3x3x5x5x7x7 2x2x5x5构成100,剩下的构不成6
90=2x3x3x5
196=2x2x7x7
300=2x2x3x5x5
最小公倍数=2x2x3x3x5x5x7x7
2x2x5x5构成100,剩下的构不成6
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