Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 651 · 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 2 PM. It is a long film. When does it end? (a) not enough info (b) 3 PM (c) 5 PM (d) 4 PM
2. 2.🧩 Ananya bought 4 markers for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹35 (b) ₹120 (c) ₹30 (d) not enough info
3. 3.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 3 PM (b) not enough info (c) 6 PM (d) 7 PM
4. 4.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
5. 5.🧩 A box has 8 rows of apples, with 8 in each row. How many apples are in the box? (a) 72 (b) 16 (c) 64 (d) not enough info
6. 6.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
7. 7.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
8. 8.🧩 Ananya bought 5 markers and a cap for ₹380 in all. Each marker cost the same. What did one marker cost? (a) ₹375 (b) ₹380 (c) ₹76 (d) not enough info
9. 9.🧩 Nisha is 7 years old. Rohan is 6 years older than Nisha. How old is Rohan? (a) not enough info (b) 13 (c) 14 (d) 6
10. 10.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 80 (b) 16 (c) 8 (d) not enough info
11. 11.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 50 (b) 5 (c) not enough info (d) 10
12. 12.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) for fun only (d) to change answers
13. 13.🧩 Nisha bought 6 markers for ₹240 in all. Each marker cost the same. What did one marker cost? (a) ₹40 (b) not enough info (c) ₹45 (d) ₹240
14. 14.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) not enough info (b) 4 (c) 40 (d) 8
15. 15.🥭 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) no mango is sweet (c) no, check more (d) yes, mangoes match
16. 16.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 8 PM (c) 7 PM (d) 5 PM
17. 17.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
18. 18.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
19. 19.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
20. 20.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion
21. 21.🧩 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
22. 22.🧩 A box has 4 rows of apples, with 4 in each row. How many apples are in the box? (a) 16 (b) 8 (c) not enough info (d) 20
23. 23.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) never see dogs (d) all dogs are mean
24. 24.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
25. 25.🧩 Kabir is 8 years old. Meera is 3 years older than Kabir. How old is Meera? (a) not enough info (b) 11 (c) 12 (d) 3
26. 26.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
27. 27.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) 9 PM (d) not enough info
28. 28.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
29. 29.🧩 Rohan bought 4 pens and a lunch box for ₹60 in all. Each pen cost the same. What did one pen cost? (a) ₹15 (b) ₹60 (c) ₹56 (d) not enough info
30. 30.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
31. 31.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking one friend (d) asking the whole class
32. 32.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
33. 33.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 6 PM (c) 7 PM (d) not enough info
34. 34.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
35. 35.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
36. 36.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
37. 37.🧩 Meera is 7 years old. Ishaan is 5 years older than Meera. How old is Ishaan? (a) not enough info (b) 5 (c) 12 (d) 13
38. 38.🧩 Aarav is 12 years old. Tara is older than Aarav. How old is Tara? (a) 17 (b) 14 (c) not enough info (d) 13
39. 39.🧩 A box has 3 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 8 (b) not enough info (c) 15 (d) 20
40. 40.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) 8 (b) 80 (c) not enough info (d) 16

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