Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 928 · 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: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
2. 2.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) no, check more (c) yes, mangoes match (d) yes, it is certain
3. 3.🧩 Vihaan is 12 years old. Diya is older than Vihaan. How old is Diya? (a) 14 (b) 13 (c) not enough info (d) 17
4. 4.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
5. 5.🧩 Saanvi bought 6 mangoes and a water bottle for ₹290 in all. Each mango cost the same. What did one mango cost? (a) ₹48 (b) ₹284 (c) ₹290 (d) not enough info
6. 6.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
7. 7.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
8. 8.🧩 A box has 6 rows of apples, with 4 in each row. How many apples are in the box? (a) 24 (b) 10 (c) 28 (d) not enough info
9. 9.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
10. 10.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) 6 PM (c) not enough info (d) 7 PM
11. 11.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
12. 12.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
13. 13.🧩 A box has 3 rows of apples, with 5 in each row. How many apples are in the box? (a) 15 (b) 8 (c) 20 (d) not enough info
14. 14.🐕 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
15. 15.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to waste time (c) for fun only (d) to be sure of results
16. 16.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
17. 17.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
18. 18.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) not enough info (b) 90 (c) 9 (d) 18
19. 19.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
20. 20.🧩 A box has 6 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 11 (b) 35 (c) 30 (d) not enough info
21. 21.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
22. 22.🧩 A box has 7 rows of guavas, with 6 in each row. How many guavas are in the box? (a) 13 (b) 48 (c) not enough info (d) 42
23. 23.🧩 A box has 8 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) not enough info (b) 40 (c) 13 (d) 45
24. 24.🧩 Kabir bought 4 markers for ₹180 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹50 (c) ₹45 (d) ₹180
25. 25.🧩 Nisha bought 3 markers and a cap for ₹230 in all. Each marker cost the same. What did one marker cost? (a) ₹76 (b) ₹227 (c) ₹230 (d) not enough info
26. 26.🧩 Aarav bought 4 mangoes and a cap for ₹130 in all. Each mango cost the same. What did one mango cost? (a) ₹130 (b) not enough info (c) ₹126 (d) ₹32
27. 27.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
28. 28.🧩 Kabir bought 2 pens and a lunch box for ₹90 in all. Each pen cost the same. What did one pen cost? (a) ₹88 (b) ₹45 (c) not enough info (d) ₹90
29. 29.🧩 Diya bought 4 mangoes and a water bottle for ₹300 in all. Each mango cost the same. What did one mango cost? (a) ₹296 (b) not enough info (c) ₹75 (d) ₹300
30. 30.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
31. 31.🧩 Tara bought 6 kites for ₹210 in all. Each kite cost the same. What did one kite cost? (a) ₹35 (b) ₹210 (c) not enough info (d) ₹40
32. 32.🧩 Kabir bought 5 kites and a cap for ₹150 in all. Each kite cost the same. What did one kite cost? (a) ₹145 (b) not enough info (c) ₹30 (d) ₹150
33. 33.🧩 Rohan bought 5 notebooks for ₹200 in all. Each notebook cost the same. What did one notebook cost? (a) ₹200 (b) ₹40 (c) not enough info (d) ₹45
34. 34.🧩 Kabir bought 5 kites and a cap for ₹305 in all. Each kite cost the same. What did one kite cost? (a) ₹305 (b) ₹61 (c) not enough info (d) ₹300
35. 35.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 3 PM (d) 2 PM
36. 36.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 3 PM (d) 5 PM
37. 37.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 40 (b) 8 (c) 4 (d) not enough info
38. 38.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
39. 39.🧩 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
40. 40.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 16 (b) not enough info (c) 80 (d) 8

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