find the HCF of 90,135 and 270 . please do it step by step
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Prime factors of 90 = 2 . 32 . 5
Prime factors of 135 = 33 . 5
Prime factors of 270 = 2 . 33 . 5
Common prime factors: 3 , 5
Common prime factors with the lowest exponent: 32, 51
GCF = 32. 51 = 45
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