Question

What is the HCF using prime factorisation of
45 and 180

Answer 1

Step-by-step explanation:

HCF of 45 and 180 by Long Division

HCF is the product of the factors that are common to each of the given numbers.

Step 1: Divide the larger number by the smaller one.

Step 2: Divide the dividend by the remainder obtained in Step 1 and repeat this step until we get the remainder as 0.

Step 3: The last dividend is the HCF of the two numbers.

Here, we take the larger value 180 as the dividend and the smaller value 45 as the divisor.

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HCF of 45 and 180 by Division Method

Answer 2

Answer

45

Step-by-step explanation:

45= 5×3×3×1

180= 2×2×5×3×3×1

Common factors = 5×3×3×1 = 45