(b) Find the Highest Common Factor (H.C.F) of 2^3 x 3^2 x 5 x 7^4, 2^3 x 3^3 x 5^2 x 7^2, 2^4 x 3 x 5 x 7^3, leaving the answer in index form. (c) Find the Lowest Common Multiple (L.C.M) of 3x^2y, 5x^3y^2 and 8xy^3.

Model answer

(b) 2^3 x 3 x 5 x 7^2; (c) 120x^3y^3

Also accepted: 2^3 x 3 x 5 x 7^2; 120x^3y^3, 2^3*3*5*7^2; 120x^3y^3, 2^3 × 3 × 5 × 7^2; 120x^3y^3

ZIMSEC Mathematics 4030/2, June 2017, Q1, via the Topical Collection

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