The LCM of 4, 5, 8 and 9 is 360.
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The LCM is 2520.
2520
1980
It is 72. Because 3 and 4 are factors of 9 and 8, then the LCM will be the same as for 9 and 8. But to factor and use the exponent method: 3 = 31 4 = 22 8 = 23 9 = 32 with the maximum prime exponents being 23x 32 = 8 x 9 = 72
Average = (8 + 9 + 5 + 6)/4 = 7Average = (8 + 9 + 5 + 6)/4 = 7Average = (8 + 9 + 5 + 6)/4 = 7Average = (8 + 9 + 5 + 6)/4 = 7