Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 825 · 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.🧩 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
2. 2.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
3. 3.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
4. 4.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a guess (d) a rumour
5. 5.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 5 PM (c) 4 PM (d) not enough info
6. 6.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 40 (b) 4 (c) 8 (d) not enough info
7. 7.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) dogs hate you (d) all dogs are mean
8. 8.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) for fun only (d) to change answers
9. 9.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 4 PM
10. 10.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
11. 11.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
12. 12.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
13. 13.🧩 Vihaan bought 4 pens and a cap for ₹130 in all. Each pen cost the same. What did one pen cost? (a) ₹130 (b) ₹126 (c) not enough info (d) ₹32
14. 14.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
15. 15.🧩 A box has 4 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 10 (b) 24 (c) 30 (d) not enough info
16. 16.🧩 Saanvi is 8 years old. Nisha is older than Saanvi. How old is Nisha? (a) not enough info (b) 9 (c) 10 (d) 13
17. 17.🧩 A box has 3 rows of guavas, with 8 in each row. How many guavas are in the box? (a) not enough info (b) 24 (c) 11 (d) 32
18. 18.🧩 Rohan bought 3 notebooks and a lunch box for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹60 (c) ₹180 (d) ₹177
19. 19.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
20. 20.🧩 Ananya bought 6 markers for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹35 (b) ₹30 (c) ₹180 (d) not enough info
21. 21.🧩 Tara is 12 years old. Meera is 3 years older than Tara. How old is Meera? (a) 15 (b) 3 (c) not enough info (d) 16
22. 22.🧩 Meera bought 2 notebooks and a cap for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) ₹180 (b) not enough info (c) ₹178 (d) ₹90
23. 23.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
24. 24.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 5 PM (b) not enough info (c) 2 PM (d) 6 PM
25. 25.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) not enough info (d) 4 PM
26. 26.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
27. 27.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
28. 28.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
29. 29.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) 6 PM (c) 7 PM (d) not enough info
30. 30.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 5 PM (c) not enough info (d) 9 PM
31. 31.🧩 Rohan is 10 years old. Tara is 4 years older than Rohan. How old is Tara? (a) not enough info (b) 14 (c) 15 (d) 4
32. 32.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 2 PM (c) not enough info (d) 5 PM
33. 33.🧩 Arjun bought 5 mangoes and a bag for ₹220 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹215 (c) ₹220 (d) ₹44
34. 34.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 7 PM
35. 35.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
36. 36.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
37. 37.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking the whole class (d) asking one friend
38. 38.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) not enough info (b) 3 PM (c) 6 PM (d) 5 PM
39. 39.🧩 Nisha bought 2 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) ₹30 (c) not enough info (d) ₹15
40. 40.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True

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