OC Thinking Skills Practice Test 20 — 2027 NSW Opportunity Class Exam

Sharpen deductive logic, argument evaluation, and analytical reasoning with this 30-question OC Thinking Skills practice test. Matched to the 2027 NSW Opportunity Class Placement Test format and timed to build real exam speed for Year 4/5 students.

Duration

30 Minutes

Format

2027 NSW Format

Questions

30 multiple-choice

Level

NSW OC Placement Test Level

Skills Covered in this Test

This practice test mirrors the official weightings of the NSW Department of Education exam.

The breakdown

  • Drawing a Conclusion: Logic-based deduction and inference from given premises.
  • Finding Procedures: Identifying the correct sequence or steps to reach an outcome.
  • Additional Evidence: Strengthening and weakening arguments with new information.
  • Detecting Reasoning Errors: Identifying flaws, assumptions, and gaps in arguments.
  • Matching Arguments: Recognising argument structures that are parallel or equivalent.
  • Relevant Selections: Choosing the option that best supports or completes an argument.
  • Identifying Similarity: Pattern and structure comparison across cases.

Sample Questions from Test 20

The first two questions of this mock test (same order and wording as the timed exam).

Thinking Skills

Question 1 · Multiple choice

Question

Which of these is not the net of a cube? Four nets labelled a to d, each showing six connected squares.

Options

  • A.a
  • B.b
  • C.c
  • D.d

Correct answer

C.c

Explanation

A cube net has six squares joined edge-to-edge so they fold into a closed cube with no overlaps and no gaps.

a) and b) are standard valid nets (common 1-4-1 and 3-3 style layouts).

d) is also a valid net (a 2-3-1–type arrangement).

c) has a column of four squares with both extra squares on the same side. When you fold that strip, those two “flaps” end up trying to cover the same face (they overlap), while another face of the cube is left open. A correct 1-4-1 net must put the two single squares on opposite sides of the strip.

So c is not a net of a cube.

Thinking Skills

Six students—Leo, Max, Noah, Owen, Toby, and Zane—are sitting at a rectangular art desk. There are exactly th…

Question 2 · Multiple choice

Question

Six students—Leo, Max, Noah, Owen, Toby, and Zane—are sitting at a rectangular art desk. There are exactly three chairs on the Window side and three chairs on the Door side, directly facing each other.

Clues:
- Leo and Max are both left-handed. The teacher insists they sit in the same row, but they absolutely refuse to sit next to each other so they don't bump elbows.
- Noah sits exactly opposite either Owen or Toby.
- If Noah sits exactly opposite Owen, then Zane sits in a middle seat.
- If Zane sits in a middle seat, then Leo sits exactly opposite Zane.

Options

Which one of the following statements must be true?

  • A.Noah sits in a corner seat.
  • B.Zane sits exactly opposite Leo.
  • C.Owen sits in a corner seat.
  • D.Toby sits immediately next to Max.

Correct answer

C.Owen sits in a corner seat.

Explanation

Draw the 2x3 grid.

Step 1: Draw the Geometry & Find the Landmine

Look at the very first rule. Leo and Max must be in the same row, but they cannot sit next to each other. In a row of 3 chairs, there is only one way to keep two people separated: Put them in the two corners and leave the middle seat empty.

We don't know which row they are in, so let's just assign them to the Window row to visualize it. This is our Landmine!

      [ WINDOW ROW ]
[ LEO/MAX ]  [ EMPTY ]  [ MAX/LEO ]
-----------------------------------
[ Corner  ]  [ Middle]  [ Corner  ]
        [ DOOR ROW ]

Step 2: The "What-If" Test (Pushing the Domino)

Look at the second rule: "Noah sits exactly opposite either Owen or Toby." We run our What-If Test on Owen because it triggers the "If" clues below it.

Assumption: What if Noah sits exactly opposite Owen?

Let's watch the dominoes fall:

  • Domino 1: If Noah sits opposite Owen, the rules say Zane sits in a middle seat.
  • Domino 2: If Zane sits in a middle seat, the rules say Leo sits exactly opposite Zane.

Step 3: The CRASH! 💥

Look at the final domino that just fell! It states that Leo sits exactly opposite Zane. We also just established that Zane is in a middle seat.

On a rectangular table, if you sit exactly opposite someone in a middle seat, you must also be in a middle seat! This means our domino chain forced Leo into a middle seat.

But look at our Landmine rule from Step 1! We already proved mathematically that Leo must sit in a corner so he doesn't bump elbows with Max.

Leo cannot be in a corner and a middle seat at the same time. This breaks the laws of physics. CRASH!

Step 4: The Rebound Deduction

Because assuming Noah sat opposite Owen caused a Corner Crash, our assumption was wrong.

  • Noah cannot sit opposite Owen. Go back to his very first rule: He had to sit opposite Owen OR Toby.
  • Therefore, Noah MUST sit exactly opposite Toby.

(Note: Because the domino trigger never happened, Zane is no longer forced into the middle seat!)

Step 5: The "Vertical Tunnel" Deduction (Solving the Leftovers)

Look at our table from Step 1. We know Noah sits exactly opposite Toby. To sit exactly opposite someone, you need a vertical "tunnel" of two empty seats directly facing each other.

Where is the only vertical tunnel left on the entire board?

  • Can they take the Left Corners? No, Leo or Max is sitting there!
  • Can they take the Right Corners? No, Max or Leo is sitting there!
  • The only empty seat in the Window Row is the Middle seat.

Therefore, the only way Noah and Toby can sit opposite each other is if they take the two Middle seats!

      [ WINDOW ROW ]
[ LEO/MAX ] [ NOAH/TOBY ] [ MAX/LEO ]
-------------------------------------
[ Corner  ] [ TOBY/NOAH ] [ Corner  ]
        [ DOOR ROW ]

Look at the board now! The middle seats are taken. The Window corners are taken. There are exactly two people left: Owen and Zane. There are exactly two seats left: The two corners of the Door Row.

We don't know if Owen is on the left and Zane is on the right, or vice versa. Option B tries to trick us into guessing. But we know with 100% logical certainty that because those are the only two seats left in the room, Owen MUST sit in a corner seat. Option C is undeniably true.

🧠 The "Repeatable Approach" for the Corner Trap

  • The Corner Squeeze: If a clue says two people are in the same row but cannot sit together, immediately write "CORNER" next to their names. They have no other choice!
  • Find the Tunnel: When you need to place a pair of people exactly opposite each other, look for the vertical columns. If a row has its corners taken up, the only vertical tunnel left is straight down the middle!
  • The Final Leftovers: You don't need to finish the whole board perfectly. Once the middle seats and one row's corners are gone, whoever is left is instantly banished to the remaining corners.

Core Competencies

Additional EvidenceData SufficiencyDetecting Reasoning ErrorsDrawing a ConclusionEvaluating HypothesesFinding ProceduresIdentifying SimilarityLogical DeductionMatching ArgumentsRelevant SelectionsSeating ArrangementsSpatial ReasoningSyllogismsTruth/Liar Puzzles

Prepare with Precision

  • Build deductive logic and analytical reasoning at OC exam speed.
  • Practise argument evaluation, spatial puzzles, and multi-variable reasoning.
  • Identify which OC Thinking Skills question types need the most work.

This public page gives students and parents a detailed look at the skills and question types covered in every OC Thinking Skills practice test. The full 30-question timed test—with real-time scoring and detailed review—is available to enrolled members, so your child can build real confidence for the 2027 NSW Opportunity Class exam.