Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 925 · 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: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
2. 2.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
3. 3.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
4. 4.🧩 A box of laddoos has 6 in each row. How many laddoos are in the box? (a) not enough info (b) 12 (c) 6 (d) 60
5. 5.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
6. 6.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
7. 7.🧩 Arjun bought 6 notebooks and a cap for ₹170 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹28 (c) ₹170 (d) ₹164
8. 8.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only
9. 9.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) facts that support it (d) a guess
10. 10.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
11. 11.🧩 Saanvi bought 5 balls and a water bottle for ₹325 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹65 (c) ₹320 (d) ₹325
12. 12.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 6 PM (c) 7 PM (d) not enough info
13. 13.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
14. 14.🧩 Ishaan is 12 years old. Aarav is older than Ishaan. How old is Aarav? (a) not enough info (b) 17 (c) 14 (d) 13
15. 15.🧩 Saanvi is 11 years old. Aarav is 9 years older than Saanvi. How old is Aarav? (a) 9 (b) not enough info (c) 20 (d) 21
16. 16.🧩 A box has 6 rows of apples, with 4 in each row. How many apples are in the box? (a) 28 (b) not enough info (c) 10 (d) 24
17. 17.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) never see dogs (c) dogs hate you (d) all dogs are mean
18. 18.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) not enough info (b) 10 PM (c) 9 PM (d) 6 PM
19. 19.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 5 PM (c) 6 PM (d) not enough info
20. 20.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) not enough info (d) 4 PM
21. 21.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no mango is sweet (c) yes, mangoes match (d) no, check more
22. 22.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
23. 23.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
24. 24.🧩 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
25. 25.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) not enough info (b) 12 (c) 60 (d) 6
26. 26.🧩 Tara bought 5 kites for ₹250 in all. Each kite cost the same. What did one kite cost? (a) ₹50 (b) ₹55 (c) ₹250 (d) not enough info
27. 27.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
28. 28.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
29. 29.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
30. 30.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
31. 31.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
32. 32.🧩 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
33. 33.🧩 Ananya bought 2 markers and a water bottle for ₹130 in all. Each marker cost the same. What did one marker cost? (a) ₹130 (b) not enough info (c) ₹65 (d) ₹128
34. 34.🧩 Vihaan bought 3 markers for ₹150 in all. Each marker cost the same. What did one marker cost? (a) ₹55 (b) not enough info (c) ₹50 (d) ₹150
35. 35.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
36. 36.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 6 PM (c) not enough info (d) 2 PM
37. 37.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
38. 38.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 12 (b) 60 (c) 6 (d) not enough info
39. 39.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) not enough info (c) 8 PM (d) 7 PM
40. 40.🧩 Arjun is 6 years old. Rohan is older than Arjun. How old is Rohan? (a) 11 (b) 8 (c) 7 (d) not enough info

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