NSW OC Mathematical Reasoning free practice questions with answers

Correct answer: B — 4300

• The line from 4000 to 5000 is split into 20 equal steps, so each step is (5000 - 4000) ÷ 20 = 50.
• The dot is 6 steps from 4000, so it shows 4000 + 6 × 50 = 4300.
• Why the other options are wrong:
• A (4250): This is the previous mark: count the steps again from the left.
• C (4350): This is the next mark: count the steps again from the left.
• D (600): This counts the steps in hundreds instead of working out the size of one step.
• E (4600): This reads the steps as tenths of the whole line, but there are 20 equal steps.

Work out the size of ONE step first (distance ÷ number of steps), then count steps from a known mark.