Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 275 · 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.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
2. 2.🧩 A box of oranges has 9 in each row. How many oranges are in the box? (a) 90 (b) not enough info (c) 9 (d) 18
3. 3.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to change answers (d) to waste time
4. 4.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
5. 5.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
6. 6.🧩 Rohan bought 5 notebooks and a cap for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) ₹150 (b) ₹30 (c) not enough info (d) ₹145
7. 7.🧩 Kabir is 12 years old. Vihaan is older than Kabir. How old is Vihaan? (a) 14 (b) 17 (c) 13 (d) not enough info
8. 8.🧩 Diya bought 5 kites and a cap for ₹310 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹62 (c) ₹310 (d) ₹305
9. 9.📊 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
10. 10.🐕 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
11. 11.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) 8 PM (d) not enough info
12. 12.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
13. 13.🧩 Ishaan is 8 years old. Rohan is older than Ishaan. How old is Rohan? (a) 9 (b) 10 (c) not enough info (d) 13
14. 14.🧩 Saanvi bought 5 notebooks for ₹75 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹75 (c) ₹15 (d) ₹20
15. 15.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
16. 16.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
17. 17.🧩 Ishaan bought 4 mangoes for ₹80 in all. Each mango cost the same. What did one mango cost? (a) ₹80 (b) ₹25 (c) ₹20 (d) not enough info
18. 18.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
19. 19.🧩 Nisha bought 6 kites and a cap for ₹120 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹114 (c) ₹20 (d) ₹120
20. 20.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
21. 21.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
22. 22.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
23. 23.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
24. 24.🧩 A box has 5 rows of eggs, with 8 in each row. How many eggs are in the box? (a) not enough info (b) 40 (c) 48 (d) 13
25. 25.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
26. 26.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
27. 27.🧩 A box of laddoos has 6 in each row. How many laddoos are in the box? (a) 6 (b) not enough info (c) 60 (d) 12
28. 28.🧩 Aarav bought 2 balls and a water bottle for ₹90 in all. Each ball cost the same. What did one ball cost? (a) ₹88 (b) ₹90 (c) ₹45 (d) not enough info
29. 29.🧩 Nisha is 7 years old. Diya is older than Nisha. How old is Diya? (a) 9 (b) 12 (c) 8 (d) not enough info
30. 30.🧩 Ishaan bought 4 balls and a cap for ₹110 in all. Each ball cost the same. What did one ball cost? (a) ₹27 (b) ₹106 (c) ₹110 (d) not enough info
31. 31.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
32. 32.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) 3 PM (d) not enough info
33. 33.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 2 PM (b) not enough info (c) 5 PM (d) 4 PM
34. 34.🧩 Nisha bought 5 notebooks for ₹75 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) not enough info (c) ₹20 (d) ₹75
35. 35.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
36. 36.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) 60 (b) 12 (c) not enough info (d) 6
37. 37.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 6 PM (c) not enough info (d) 7 PM
38. 38.🧩 Tara bought 4 markers and a water bottle for ₹200 in all. Each marker cost the same. What did one marker cost? (a) ₹196 (b) ₹50 (c) not enough info (d) ₹200
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.🧩 Nisha bought 4 notebooks and a cap for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) ₹180 (b) ₹45 (c) not enough info (d) ₹176

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