Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 388 · 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: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
2. 2.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 5 PM
3. 3.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) all dogs are mean (d) that one dog barked
4. 4.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
5. 5.🧩 Kabir bought 4 pens and a cap for ₹300 in all. Each pen cost the same. What did one pen cost? (a) ₹300 (b) ₹296 (c) not enough info (d) ₹75
6. 6.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
7. 7.🧩 Nisha bought 4 pens and a lunch box for ₹230 in all. Each pen cost the same. What did one pen cost? (a) ₹230 (b) ₹57 (c) not enough info (d) ₹226
8. 8.🧩 Aarav bought 2 markers and a lunch box for ₹90 in all. Each marker cost the same. What did one marker cost? (a) ₹90 (b) ₹88 (c) ₹45 (d) not enough info
9. 9.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
10. 10.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
11. 11.🧩 Tara is 6 years old. Diya is 5 years older than Tara. How old is Diya? (a) not enough info (b) 5 (c) 11 (d) 12
12. 12.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to waste time (d) to be sure of results
13. 13.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) not enough info (b) 6 PM (c) 8 PM (d) 7 PM
14. 14.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) not enough info (b) 3 PM (c) 5 PM (d) 4 PM
15. 15.🧩 Ishaan bought 3 balls and a cap for ₹155 in all. Each ball cost the same. What did one ball cost? (a) ₹155 (b) ₹152 (c) not enough info (d) ₹51
16. 16.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 6 PM (d) 5 PM
17. 17.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 80 (b) not enough info (c) 16 (d) 8
18. 18.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
19. 19.🧩 A box of oranges has 9 in each row. How many oranges are in the box? (a) 90 (b) 9 (c) not enough info (d) 18
20. 20.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
21. 21.🧩 A box has 4 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 8 (b) 20 (c) 16 (d) not enough info
22. 22.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
23. 23.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
24. 24.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
25. 25.📊 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
26. 26.🧩 Kabir is 11 years old. Diya is older than Kabir. How old is Diya? (a) not enough info (b) 16 (c) 12 (d) 13
27. 27.🧩 Kabir bought 6 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) ₹10 (c) ₹60 (d) not enough info
28. 28.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 3 PM (c) 2 PM (d) 4 PM
29. 29.🧩 Ishaan bought 4 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹100 (b) ₹30 (c) ₹25 (d) not enough info
30. 30.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
31. 31.🧩 A box has 8 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 40 (b) 13 (c) not enough info (d) 45
32. 32.🥭 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, mangoes match (c) yes, it is certain (d) no mango is sweet
33. 33.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
34. 34.🧩 Saanvi is 9 years old. Vihaan is older than Saanvi. How old is Vihaan? (a) not enough info (b) 14 (c) 11 (d) 10
35. 35.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
36. 36.🧩 Vihaan is 11 years old. Tara is 3 years older than Vihaan. How old is Tara? (a) 3 (b) 15 (c) not enough info (d) 14
37. 37.🧩 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
38. 38.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
39. 39.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
40. 40.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence

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