Singapore SEC G3 Maths free practice questions with answers
Read question 1 and its full worked answer from paper 1 of our 20-paper Singapore SEC G3 Maths set, then download the 3-page PDF. These are original practice questions, not official past papers. Page updated 3 November 2026.
(2 marks)
Factorise completely 18x − 48.
Answer
Question 1 (2 marks) [Algebraic manipulation]
Factorise completely 18x − 48.
Answer: 6(3x − 8)
- Find the largest number that divides both terms: 6.
- Divide each term by 6: 3x − 8.
- Answer: 6(3x − 8).
Take out the highest common factor first.
Your sample is downloading. Liked it? Singapore SEC G3 Maths Paper 1 is the full paper: 36 questions and 180 marks across Paper 1 (26 short-answer) and Paper 2 (10 structured, the last a real-world problem), 2 hours 15 minutes per paper, calculator allowed, with a worked solution for every question.
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Questions about this sample
What is in the Singapore SEC G3 Maths free sample?
The first 3 questions from paper 1 of the set, in the real exam layout, followed by the step-by-step worked answers. It is a 3-page PDF; this page shows question 1 with its answer.
How many full Singapore SEC G3 Maths papers are there?
20 original papers for Singapore secondary students preparing for SEC G3 Mathematics (K310) from 2027. Each is 36 questions and 180 marks across Paper 1 (26 short-answer) and Paper 2 (10 structured, the last a real-world problem), 2 hours 15 minutes per paper, calculator allowed, with a worked solution for every question. Papers start at A$11.99 and download instantly as a PDF.
Are these official past papers?
No. The sample is taken from our own original practice paper and is not an official past paper or affiliated with any exam authority.