ECZ 2011 · O-Level Paper 2 · Question 1 — Algebra

Question from ECZ 2011 · O-Level Paper 2 · Question 1

(a) Evaluate 3 14 ÷ 5 15.[1]

Verified working — step 1

Convert to improper fractions: 3 14 = 134 and 5 15 = 265.

(b) Simplify 90 × 0.320.016 × 4.5.[2]

Verified working — step 1

Pair the factors to make the division easy.

(c) Express 25 + 14 ÷ 13 as a percentage.[3]

Verified working — step 1

Division comes before addition: 14 divided by 13 = 14 × 3 = 34.

(d) Factorise completely 3x² - 3.[2]

Verified working — step 1

Take out the common factor 3 first.

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Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.

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