Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 765 · 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.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) facts that support it (d) a loud opinion
2. 2.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
3. 3.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
4. 4.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
5. 5.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
6. 6.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
7. 7.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) yes, it is certain (c) no, check more (d) no mango is sweet
8. 8.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) dogs hate you (d) never see dogs
9. 9.🧩 Nisha bought 3 mangoes for ₹30 in all. Each mango cost the same. What did one mango cost? (a) ₹30 (b) not enough info (c) ₹15 (d) ₹10
10. 10.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
11. 11.🧩 Kabir is 8 years old. Tara is older than Kabir. How old is Tara? (a) not enough info (b) 10 (c) 13 (d) 9
12. 12.🧩 Meera is 6 years old. Kabir is 4 years older than Meera. How old is Kabir? (a) 4 (b) not enough info (c) 10 (d) 11
13. 13.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) not enough info (b) 8 PM (c) 6 PM (d) 9 PM
14. 14.🧩 A box of oranges has 9 in each row. How many oranges are in the box? (a) 18 (b) not enough info (c) 9 (d) 90
15. 15.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 4 PM (c) 5 PM (d) not enough info
16. 16.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
17. 17.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
18. 18.🧩 A box has 8 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) not enough info (b) 32 (c) 36 (d) 12
19. 19.🧩 Aarav bought 3 mangoes and a water bottle for ₹170 in all. Each mango cost the same. What did one mango cost? (a) ₹167 (b) not enough info (c) ₹170 (d) ₹56
20. 20.🧩 Ishaan is 12 years old. Nisha is older than Ishaan. How old is Nisha? (a) 14 (b) 13 (c) not enough info (d) 17
21. 21.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
22. 22.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) not enough info (b) 2 PM (c) 5 PM (d) 6 PM
23. 23.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
24. 24.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 8 PM
25. 25.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
26. 26.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
27. 27.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
28. 28.🧩 Ananya is 11 years old. Vihaan is older than Ananya. How old is Vihaan? (a) 12 (b) 16 (c) 13 (d) not enough info
29. 29.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
30. 30.🧩 Diya is 9 years old. Ishaan is older than Diya. How old is Ishaan? (a) 14 (b) 11 (c) 10 (d) not enough info
31. 31.🧩 Tara bought 2 markers and a lunch box for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) ₹120 (c) ₹118 (d) not enough info
32. 32.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 5 PM (c) 6 PM (d) not enough info
33. 33.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
34. 34.🧩 Meera bought 4 kites and a bag for ₹290 in all. Each kite cost the same. What did one kite cost? (a) ₹72 (b) not enough info (c) ₹286 (d) ₹290
35. 35.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 5 PM (d) 3 PM
36. 36.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
37. 37.🧩 Arjun bought 2 mangoes for ₹80 in all. Each mango cost the same. What did one mango cost? (a) ₹45 (b) ₹40 (c) ₹80 (d) not enough info
38. 38.🧩 Saanvi bought 3 markers and a water bottle for ₹160 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹53 (c) ₹160 (d) ₹157
39. 39.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
40. 40.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True

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