Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 836 · 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.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) dogs hate you (d) that one dog barked
2. 2.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
3. 3.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
4. 4.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 6 PM (d) 4 PM
5. 5.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
6. 6.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
7. 7.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) a loud opinion (d) facts that support it
8. 8.🧩 Meera bought 5 kites and a cap for ₹80 in all. Each kite cost the same. What did one kite cost? (a) ₹16 (b) ₹80 (c) not enough info (d) ₹75
9. 9.🧩 Kabir is 8 years old. Ishaan is 9 years older than Kabir. How old is Ishaan? (a) 17 (b) not enough info (c) 9 (d) 18
10. 10.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
11. 11.🧩 Kabir is 6 years old. Vihaan is 8 years older than Kabir. How old is Vihaan? (a) not enough info (b) 15 (c) 14 (d) 8
12. 12.🧩 Rohan is 11 years old. Vihaan is older than Rohan. How old is Vihaan? (a) 13 (b) not enough info (c) 16 (d) 12
13. 13.🧩 Diya is 12 years old. Arjun is 5 years older than Diya. How old is Arjun? (a) 5 (b) 18 (c) not enough info (d) 17
14. 14.🧩 Ishaan is 6 years old. Aarav is 4 years older than Ishaan. How old is Aarav? (a) 11 (b) 4 (c) not enough info (d) 10
15. 15.🧩 Nisha bought 3 mangoes for ₹45 in all. Each mango cost the same. What did one mango cost? (a) ₹45 (b) not enough info (c) ₹15 (d) ₹20
16. 16.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
17. 17.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 3 PM (c) 4 PM (d) not enough info
18. 18.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) 8 PM (d) not enough info
19. 19.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
20. 20.🧩 A box has 4 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 11 (b) not enough info (c) 35 (d) 28
21. 21.🧩 Rohan bought 2 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹30 (c) ₹15 (d) ₹20
22. 22.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to waste time (d) to change answers
23. 23.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 3 PM
24. 24.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
25. 25.🧩 A box has 5 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 30 (b) 10 (c) not enough info (d) 25
26. 26.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
27. 27.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
28. 28.🧩 Aarav is 10 years old. Vihaan is 5 years older than Aarav. How old is Vihaan? (a) 5 (b) not enough info (c) 16 (d) 15
29. 29.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
30. 30.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
31. 31.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
32. 32.🧩 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
33. 33.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
34. 34.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 5 PM (d) 6 PM
35. 35.🧩 A box has 4 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 30 (b) not enough info (c) 24 (d) 10
36. 36.🧩 A box has 7 rows of eggs, with 7 in each row. How many eggs are in the box? (a) 56 (b) 49 (c) not enough info (d) 14
37. 37.🧩 Saanvi bought 3 notebooks and a water bottle for ₹85 in all. Each notebook cost the same. What did one notebook cost? (a) ₹82 (b) ₹85 (c) not enough info (d) ₹28
38. 38.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
39. 39.🧩 Diya bought 4 markers and a bag for ₹140 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹136 (c) ₹140 (d) ₹35
40. 40.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 9 PM (c) 8 PM (d) not enough info

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