Question

Jse prime Pactors to determine the HCF of 90 and 126 ​

Answer 1

18

Explanation:

first use the factor tree to find the factors of 90 and 126

90={2×3×3×5}

126={2×3×3×7}

for HCF take common factors with low exponents

HCF={2×3×3}

18