x2=90 x3=135 x4=180 x5=225 x6=270 x7=315 x8=360 x9=405 x10=450 x11=495 x12=540
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The common multiples of 30 and 45 are 3 (*10 and *15) and 15 (*2 and *3) and 5
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180 is because it the lowest number that both 20 and 45 go into. the multiples of 20 are: 20, 40, 60, 80, 100, 120, 140, 160, 180, 200 the multiples of 45 are: 45, 90, 135, 180. So
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For exponents, you can use the carat symbol, like the one on the calculator: x^2 means x to the second power or x squared. The LCM must contain all of the factors of each term. First
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