Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 965 · 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 3 PM and lasts 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 3 PM (d) 7 PM
2. 2.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) not enough info (b) 90 (c) 9 (d) 18
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 checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
5. 5.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) not enough info (b) 8 (c) 80 (d) 16
6. 6.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
7. 7.🧩 Arjun bought 3 balls for ₹135 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹45 (c) ₹135 (d) ₹50
8. 8.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a guess (d) a rumour
9. 9.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
10. 10.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
11. 11.🥭 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
12. 12.🧩 Arjun is 6 years old. Aarav is older than Arjun. How old is Aarav? (a) 8 (b) 7 (c) 11 (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.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 5 PM
15. 15.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
16. 16.🧩 Ishaan 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
17. 17.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 10 PM (b) 9 PM (c) 6 PM (d) not enough info
18. 18.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) not enough info (b) 90 (c) 18 (d) 9
19. 19.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 4 PM (c) 2 PM (d) not enough info
20. 20.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) that one dog barked (d) all dogs are mean
21. 21.🧩 A box has 8 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 40 (b) not enough info (c) 45 (d) 13
22. 22.🧩 Saanvi bought 3 notebooks and a water bottle for ₹195 in all. Each notebook cost the same. What did one notebook cost? (a) ₹192 (b) ₹195 (c) not enough info (d) ₹65
23. 23.🧩 Nisha bought 5 notebooks for ₹200 in all. Each notebook cost the same. What did one notebook cost? (a) ₹45 (b) not enough info (c) ₹200 (d) ₹40
24. 24.🧩 A box has 4 rows of apples, with 7 in each row. How many apples are in the box? (a) 28 (b) 35 (c) not enough info (d) 11
25. 25.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
26. 26.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
27. 27.🧩 Ananya is 6 years old. Rohan is 8 years older than Ananya. How old is Rohan? (a) not enough info (b) 15 (c) 8 (d) 14
28. 28.🧩 A box has 3 rows of apples, with 8 in each row. How many apples are in the box? (a) 11 (b) 32 (c) not enough info (d) 24
29. 29.🧩 A box has 5 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 35 (b) not enough info (c) 42 (d) 12
30. 30.🧩 Saanvi is 6 years old. Tara is older than Saanvi. How old is Tara? (a) 8 (b) not enough info (c) 7 (d) 11
31. 31.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
32. 32.🧩 Ananya bought 5 kites and a cap for ₹300 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹295 (c) ₹60 (d) ₹300
33. 33.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 6 PM (d) 5 PM
34. 34.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) for fun only (d) to waste time
35. 35.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
36. 36.🧩 A box has 5 rows of apples, with 5 in each row. How many apples are in the box? (a) not enough info (b) 30 (c) 25 (d) 10
37. 37.🧩 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
38. 38.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 50 (b) 5 (c) not enough info (d) 10
39. 39.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
40. 40.🧩 A box has 8 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 63 (b) 15 (c) not enough info (d) 56

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