Work through the levels in order. Type your answer and press Check — open the worked solution if you get stuck. Answers like -6, 3/4 or 0.25 are typed exactly as shown. A ⭐ Bonus Challenge at the end is extra credit — skip it if the rest was hard work.
Level 1 · Warm-up
1 Complete: fitting a description does not make something the ____ match. (one word)
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The only match — more than one thing can fit any description.
2 A minimum requirement is an entry ticket, not a ____. (one word)
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Not a prize/guarantee — meeting it lets you compete; it never promises success.
3 Two things changed at the same time. Does that PROVE one caused the other?
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No — something else may have changed too, or it may be a coincidence.
Level 2 · Core
4 Jo: "The note is in neat handwriting. Priya has neat handwriting, so Priya wrote it." Which family number (1–8)?
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Family 1, more than one match — many people write neatly.
5 Ren: "A third of families own a dog? No way — none of my cousins do." Which family number (1–8)?
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Family 4 — a few cousins cannot disprove a statistic about all families.
6 Rule: "All Year 4 students wear a green badge." Tam: "Kai wears a green badge, so Kai is in Year 4." Which family number (1–8)?
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Family 8, the rule run backwards — the rule never said only Year 4 wear green.
Level 3 · Challenge
7 The chess club chose Nicole over Jacob because she won 11 of 12 games and he won 3 of 14. What did the comparison leave out? (one or two words)
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Who they played — Jacob may have faced far stronger opponents. Family 7.
8 Two reasons for a flat tyre were suggested: a nail, or a slow leak at the valve. Dev finds a nail and says the valve is fine. Which family number (1–8)?
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Family 6 — finding the nail does not rule out the valve; both can be true.
9 Officer: "The muddy footprints are size 8. Dad wears size 8, so Dad walked through the kitchen." Which option names the flaw:
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B — more than one match. The others are true-ish but never name the jump.