Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 284 · 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.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 3 PM (c) not enough info (d) 5 PM
2. 2.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
3. 3.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
4. 4.🧩 Rohan is 8 years old. Nisha is 9 years older than Rohan. How old is Nisha? (a) 18 (b) not enough info (c) 17 (d) 9
5. 5.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) asking the whole class (d) guessing
6. 6.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) yes, mangoes match (c) no mango is sweet (d) no, check more
7. 7.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) dogs hate you (d) that one dog barked
8. 8.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 4 (b) 8 (c) 40 (d) not enough info
9. 9.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 8 (b) not enough info (c) 16 (d) 80
10. 10.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
11. 11.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
12. 12.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
13. 13.🧩 A box has 6 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) not enough info (b) 15 (c) 63 (d) 54
14. 14.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to be sure of results (d) to waste time
15. 15.🧩 Diya is 8 years old. Nisha is 9 years older than Diya. How old is Nisha? (a) 9 (b) not enough info (c) 18 (d) 17
16. 16.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) not enough info (c) 4 PM (d) 5 PM
17. 17.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 8 (b) 4 (c) 40 (d) not enough info
18. 18.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
19. 19.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
20. 20.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
21. 21.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
22. 22.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 9 PM (b) 8 PM (c) not enough info (d) 6 PM
23. 23.🧩 Kabir bought 6 markers for ₹300 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹300 (c) ₹55 (d) ₹50
24. 24.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
25. 25.🧩 A box has 4 rows of apples, with 8 in each row. How many apples are in the box? (a) not enough info (b) 40 (c) 32 (d) 12
26. 26.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 18 (b) 90 (c) not enough info (d) 9
27. 27.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 7 PM (c) 6 PM (d) not enough info
28. 28.🧩 Vihaan bought 6 kites and a bag for ₹360 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹60 (c) ₹360 (d) ₹354
29. 29.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
30. 30.🧩 A box has 8 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 16 (b) not enough info (c) 64 (d) 72
31. 31.🧩 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
32. 32.🧩 Rohan is 11 years old. Ishaan is older than Rohan. How old is Ishaan? (a) 12 (b) 13 (c) not enough info (d) 16
33. 33.🧩 Arjun bought 5 markers for ₹175 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹40 (c) ₹35 (d) ₹175
34. 34.🧩 A box has 8 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) 72 (b) not enough info (c) 81 (d) 17
35. 35.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) facts that support it (d) a loud opinion
36. 36.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
37. 37.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
38. 38.🧩 Ananya bought 5 notebooks and a cap for ₹220 in all. Each notebook cost the same. What did one notebook cost? (a) ₹215 (b) ₹220 (c) ₹44 (d) not enough info
39. 39.🧩 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
40. 40.🧩 Diya is 10 years old. Ananya is 9 years older than Diya. How old is Ananya? (a) 9 (b) not enough info (c) 20 (d) 19

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