OC Practice Mock 1 — Thinking Skills (Year 3, early preparation)
A free NSW Opportunity Class (OC) placement test practice paper for Year 3 in the format of the real test: 30 questions in 30 minutes, covering Section A — Critical thinking; Section B — Problem solving. 30 minutes — about one minute per question. Choose the best answer. Answer every question — there is no penalty for a wrong answer. Attempt it online — every question is marked instantly and the correct answers are shown at the end.
Free · attempted online · no download
Q1. Mia says: "Our class should plant a vegetable garden at school."
Which reason best supports what Mia says?
Q2. Tom says: "The café in the park must be closed today, because nobody is sitting at its outside tables."
Which statement, if true, most weakens Tom's argument?
Q3. All the children in the chess club are in Year 3. Some children in the chess club also play soccer. Nina is in the chess club.
Which of these must be true?
Q4. Jack says: "All dogs have four legs. My pet Tiger has four legs, so Tiger must be a dog."
Which sentence shows the mistake in Jack's thinking?
Q5. Mrs Lee's class has a rule: if it rains, the class eats lunch inside. Today the class ate lunch inside.
Ava says: "That means it must have rained today."
Leo says: "They ate inside, but that does not prove it rained."
If the information is true, whose reasoning is correct?
Q6. In Ella's pencil case, some pencils are red, and every red pencil is sharp.
Ava says: "So every sharp pencil in the case is red."
Leo says: "So none of the blue pencils in the case are sharp."
If the information is true, whose reasoning is correct?
Q7. At the school fair, every stall that sold cakes also sold drinks. The book stall did not sell drinks.
Ava says: "So the book stall did not sell cakes."
Leo says: "So every stall that sold drinks also sold cakes."
If the information is true, whose reasoning is correct?
Q8. In a running race, Ruby finished before Max, and Max finished before Ivy.
Ava says: "So Ruby finished before Ivy."
Leo says: "So Ivy did not win the race."
If the information is true, whose reasoning is correct?
Q9. Mr Chen asked 20 children in Year 3 how they get to school. 15 of them said they walk.
Which conclusion is fair?
Q10. Grace says: "Everyone who finishes their reading log this week gets a sticker, so I will get a sticker."
Grace's reasoning only works if which of these is true?
Q11. Oliver says: "The new slide is the most popular thing in our playground."
Which statement best supports what Oliver says?
Q12. Ella says: "My sunflower grew taller than Ben's sunflower because I watered mine every day."
Which statement, if true, most weakens Ella's argument?
Q13. Kai is taller than Rosa. Rosa is taller than Finn. Lily is shorter than Finn.
Who is the second shortest?
Q14. Amy, Ben, Cara, Dev and Eli stand in a line, one behind the other. Cara is at the front. Ben is exactly in the middle. Dev is directly behind Ben. Eli is not next to Cara.
Who is at the back of the line?
Q15. Ivy, Max, Noah and Pia each play a different sport: tennis, soccer, swimming or netball.
Pia plays netball. Noah does not play tennis or soccer. Ivy does not play soccer.
Which sport does Max play?
Q16. In a secret code, each letter is changed to the letter that comes next in the alphabet. So CAT is written as DBU.
How is DOG written in this code?
Q17. In a code, A = 1, B = 2, C = 3, and so on through the alphabet. The value of a word is found by adding the values of its letters. For example, BAD = 2 + 1 + 4 = 7.
Which word has a value of 10?
Q18. What number comes next in this pattern?
3, 4, 6, 9, 13, ?
Q19. These pictures follow a pattern. Which picture should replace the question mark?
Q20. Which picture shows the shape reflected in the dashed mirror line?
Q21. The shape is given a quarter turn clockwise (the way a clock's hands move). Which picture shows the shape after the turn?
Q22. This model is made of identical cubes stacked on a table. Its base is 3 cubes long and 2 cubes wide. Every cube is either on the table or on top of another cube.
How many cubes are in the model?
Q23. Which piece fills the white gap in the square exactly? Pieces may be turned around.
Q24. A square piece of paper is folded in half along the dashed line, left side over right side. Then a hole is punched through both layers.
What does the paper look like when it is unfolded?
Q25. The 1st of March is a Tuesday. What day of the week is the 20th of March?
Q26. Tom's birthday is on 25 June. Mia's birthday is 10 days after Tom's. June has 30 days.
When is Mia's birthday?
Q27. Both scales are balanced. Fruits of the same kind all weigh the same.
How many cherries would balance 1 apple?
Q28. A balance scale is level. On one side are 3 identical boxes. On the other side are 1 of the same boxes and an 8 kg weight.
How heavy is one box?
Q29. Ali, Bea, Cam and Dan ran a race, and nobody tied. Ali did not come first or last. Bea finished straight after Cam. Dan finished ahead of Ali.
Who came third?
Q30. Sam has 7 coins. Each coin is either 5c or 10c. Altogether the coins are worth 50c.
How many 10c coins does Sam have?
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