HAST Year 9 Mathematical Reasoning free practice questions with answers
Read question 1 and its full worked answer from paper 1 of our 20-paper HAST Year 9 Mathematical Reasoning set, then download the 4-page PDF. These are original practice questions, not official past papers. Page updated 3 November 2026.
What is 12.4 - 5.5?
A 6.9
B 69
C 7
D 0.69
Correct answer: A — 6.9
- Line up the decimal points (for + and -).
- Calculate carefully: 6.9.
- Why the other options are wrong:
- B (69): Check the decimal places.
- C (7): This value does not result from a valid step in the working above, which reaches 6.9. It usually comes from using the wrong formula, the wrong quantity or a unit that was not converted. The correct method starts: Line up the decimal points (for + and -).
- D (0.69): Check the decimal places.
Decimals: line up the points to add or subtract; count decimal places when multiplying.
Your sample is downloading. Liked it? HAST Year 9 Mathematical Reasoning Paper 1 is the full paper: 35 multiple-choice questions in 40 minutes (4 options each, no calculator), with a worked solution for every question.
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Questions about this sample
What is in the HAST Year 9 Mathematical Reasoning 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 4-page PDF; this page shows question 1 with its answer.
How many full HAST Year 9 Mathematical Reasoning papers are there?
20 original papers for students preparing for Year 9 entry (HAST (High Achievers Selection Test)). Each is 35 multiple-choice questions in 40 minutes (4 options each, no calculator), 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.