Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 945 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
2. 2.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
3. 3.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) guessing (d) asking your pet
4. 4.🧩 Arjun bought 3 mangoes for ₹150 in all. Each mango cost the same. What did one mango cost? (a) ₹150 (b) ₹55 (c) ₹50 (d) not enough info
5. 5.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
6. 6.🧩 Ananya is 11 years old. Aarav is older than Ananya. How old is Aarav? (a) 13 (b) 12 (c) not enough info (d) 16
7. 7.🧩 Ishaan is 9 years old. Aarav is 8 years older than Ishaan. How old is Aarav? (a) not enough info (b) 8 (c) 17 (d) 18
8. 8.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) 4 PM (d) not enough info
9. 9.🧩 Meera bought 5 markers and a cap for ₹320 in all. Each marker cost the same. What did one marker cost? (a) ₹64 (b) ₹320 (c) ₹315 (d) not enough info
10. 10.🧩 Arjun bought 4 notebooks for ₹200 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹200 (c) ₹50 (d) ₹55
11. 11.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) that one dog barked (d) dogs hate you
12. 12.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
13. 13.🧩 Kabir bought 5 kites and a water bottle for ₹390 in all. Each kite cost the same. What did one kite cost? (a) ₹385 (b) ₹390 (c) not enough info (d) ₹78
14. 14.🧩 A box has 8 rows of eggs, with 8 in each row. How many eggs are in the box? (a) not enough info (b) 72 (c) 64 (d) 16
15. 15.🧩 Diya bought 2 kites for ₹100 in all. Each kite cost the same. What did one kite cost? (a) ₹55 (b) ₹100 (c) ₹50 (d) not enough info
16. 16.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 5 PM
17. 17.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a rumour (d) a loud opinion
18. 18.🧩 A box has 3 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 9 (b) 24 (c) not enough info (d) 18
19. 19.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 3 PM (c) 5 PM (d) not enough info
20. 20.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
21. 21.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
22. 22.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
23. 23.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
24. 24.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
25. 25.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
26. 26.🧩 Aarav bought 4 mangoes for ₹140 in all. Each mango cost the same. What did one mango cost? (a) ₹140 (b) ₹35 (c) not enough info (d) ₹40
27. 27.🧩 Meera is 12 years old. Saanvi is 4 years older than Meera. How old is Saanvi? (a) 4 (b) 17 (c) 16 (d) not enough info
28. 28.🧩 Arjun is 10 years old. Vihaan is 5 years older than Arjun. How old is Vihaan? (a) 15 (b) not enough info (c) 16 (d) 5
29. 29.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
30. 30.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
31. 31.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, it is certain (c) yes, mangoes match (d) no mango is sweet
32. 32.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
33. 33.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
34. 34.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 4 PM
35. 35.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
36. 36.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
37. 37.🧩 Arjun bought 3 markers and a water bottle for ₹180 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹177 (c) ₹180 (d) ₹60
38. 38.🧩 Ananya is 11 years old. Kabir is 2 years older than Ananya. How old is Kabir? (a) 14 (b) 2 (c) not enough info (d) 13
39. 39.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to waste time (d) to change answers
40. 40.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 6 PM (c) 5 PM (d) not enough info

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