Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 111 · 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: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
2. 2.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
3. 3.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
4. 4.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
5. 5.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
6. 6.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
7. 7.🧩 Saanvi bought 4 kites for ₹100 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹25 (c) ₹30 (d) ₹100
8. 8.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
9. 9.🧩 Arjun bought 2 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) ₹15 (c) ₹30 (d) not enough info
10. 10.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
11. 11.🧩 Ananya bought 2 balls and a bag for ₹160 in all. Each ball cost the same. What did one ball cost? (a) ₹158 (b) ₹160 (c) not enough info (d) ₹80
12. 12.🧩 Arjun is 12 years old. Tara is older than Arjun. How old is Tara? (a) 13 (b) not enough info (c) 14 (d) 17
13. 13.🧩 Aarav bought 2 kites for ₹20 in all. Each kite cost the same. What did one kite cost? (a) ₹15 (b) ₹20 (c) ₹10 (d) not enough info
14. 14.🧩 Diya bought 5 kites and a lunch box for ₹190 in all. Each kite cost the same. What did one kite cost? (a) ₹185 (b) ₹190 (c) ₹38 (d) not enough info
15. 15.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
16. 16.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to waste time (d) to change answers
17. 17.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) not enough info (b) 7 PM (c) 8 PM (d) 6 PM
18. 18.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) not enough info (b) 6 (c) 12 (d) 60
19. 19.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) facts that support it (d) a loud opinion
20. 20.🧩 Kabir bought 4 pens for ₹160 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹45 (c) ₹160 (d) ₹40
21. 21.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) 14 (b) 7 (c) not enough info (d) 70
22. 22.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
23. 23.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
24. 24.🧩 Ishaan is 7 years old. Kabir is older than Ishaan. How old is Kabir? (a) 12 (b) 9 (c) 8 (d) not enough info
25. 25.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 40 (b) not enough info (c) 8 (d) 4
26. 26.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
27. 27.🧩 Arjun bought 2 markers for ₹90 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) ₹45 (c) ₹90 (d) not enough info
28. 28.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 8 (b) 40 (c) 4 (d) not enough info
29. 29.🧩 Nisha bought 5 balls and a cap for ₹120 in all. Each ball cost the same. What did one ball cost? (a) ₹115 (b) not enough info (c) ₹24 (d) ₹120
30. 30.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) never see dogs (d) that one dog barked
31. 31.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
32. 32.🧩 Diya bought 5 notebooks for ₹50 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹50 (c) ₹10 (d) ₹15
33. 33.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 6 PM (d) 7 PM
34. 34.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
35. 35.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 5 (b) not enough info (c) 10 (d) 50
36. 36.🧩 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
37. 37.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 2 PM (c) 4 PM (d) 3 PM
38. 38.📊 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
39. 39.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
40. 40.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True

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