Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 740 · 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 6 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 9 PM
2. 2.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) a guess (d) facts that support it
3. 3.🧩 A box has 5 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 9 (b) not enough info (c) 24 (d) 20
4. 4.🧩 Aarav bought 4 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹35 (b) not enough info (c) ₹30 (d) ₹120
5. 5.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
6. 6.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking your pet (d) asking one friend
7. 7.🧩 Diya bought 4 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) ₹60 (c) ₹15 (d) not enough info
8. 8.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 5 PM (c) 8 PM (d) 7 PM
9. 9.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) 6 PM (c) 5 PM (d) not enough info
10. 10.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) not enough info (c) 7 PM (d) 8 PM
11. 11.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no mango is sweet (c) no, check more (d) yes, it is certain
12. 12.🧩 Meera bought 6 kites and a cap for ₹330 in all. Each kite cost the same. What did one kite cost? (a) ₹55 (b) ₹330 (c) ₹324 (d) not enough info
13. 13.🧩 A box has 8 rows of oranges, with 9 in each row. How many oranges are in the box? (a) 72 (b) 81 (c) 17 (d) not enough info
14. 14.🧩 Arjun bought 2 balls for ₹40 in all. Each ball cost the same. What did one ball cost? (a) ₹25 (b) ₹40 (c) ₹20 (d) not enough info
15. 15.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
16. 16.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to change answers (d) to be sure of results
17. 17.🧩 Rohan bought 3 mangoes and a cap for ₹95 in all. Each mango cost the same. What did one mango cost? (a) ₹95 (b) not enough info (c) ₹92 (d) ₹31
18. 18.🧩 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
19. 19.🧩 Nisha is 9 years old. Aarav is older than Nisha. How old is Aarav? (a) 11 (b) 10 (c) 14 (d) not enough info
20. 20.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
21. 21.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
22. 22.🧩 A box has 7 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 42 (b) not enough info (c) 13 (d) 48
23. 23.🧩 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
24. 24.🧩 Meera bought 4 balls and a cap for ₹130 in all. Each ball cost the same. What did one ball cost? (a) ₹126 (b) ₹32 (c) not enough info (d) ₹130
25. 25.🧩 Nisha bought 5 notebooks and a water bottle for ₹70 in all. Each notebook cost the same. What did one notebook cost? (a) ₹70 (b) ₹14 (c) not enough info (d) ₹65
26. 26.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
27. 27.🧩 Diya bought 3 balls and a bag for ₹180 in all. Each ball cost the same. What did one ball cost? (a) ₹60 (b) not enough info (c) ₹180 (d) ₹177
28. 28.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 8 PM
29. 29.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) that one dog barked (d) dogs hate you
30. 30.🧩 Aarav bought 3 markers for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹25 (b) not enough info (c) ₹20 (d) ₹60
31. 31.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
32. 32.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) not enough info (d) 6 PM
33. 33.🧩 A box has 3 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) not enough info (b) 20 (c) 8 (d) 15
34. 34.🧩 A box has 7 rows of apples, with 5 in each row. How many apples are in the box? (a) 40 (b) 12 (c) 35 (d) not enough info
35. 35.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
36. 36.🧩 Aarav bought 5 notebooks for ₹300 in all. Each notebook cost the same. What did one notebook cost? (a) ₹65 (b) ₹300 (c) not enough info (d) ₹60
37. 37.🧩 Diya bought 6 kites and a lunch box for ₹360 in all. Each kite cost the same. What did one kite cost? (a) ₹360 (b) ₹354 (c) not enough info (d) ₹60
38. 38.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 8 PM (b) 6 PM (c) 9 PM (d) not enough info
39. 39.🧩 Aarav bought 4 notebooks for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹60 (c) ₹65 (d) ₹240
40. 40.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True

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