Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 991 · 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.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to be sure of results (d) to waste time
2. 2.🧩 Meera bought 2 mangoes and a lunch box for ₹70 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹35 (c) ₹68 (d) ₹70
3. 3.🧩 Arjun bought 2 markers and a lunch box for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹30 (b) ₹58 (c) not enough info (d) ₹60
4. 4.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
5. 5.🧩 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
6. 6.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
7. 7.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) 5 PM (d) not enough info
8. 8.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
9. 9.🧩 A box has 7 rows of laddoos, with 6 in each row. How many laddoos are in the box? (a) 42 (b) 48 (c) not enough info (d) 13
10. 10.🧩 A box has 3 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 18 (b) 9 (c) 24 (d) not enough info
11. 11.🧩 Saanvi is 11 years old. Aarav is older than Saanvi. How old is Aarav? (a) 12 (b) 16 (c) 13 (d) not enough info
12. 12.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion
13. 13.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
14. 14.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) never see dogs (d) dogs hate you
15. 15.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
16. 16.🧩 Aarav is 10 years old. Ishaan is 3 years older than Aarav. How old is Ishaan? (a) 3 (b) 14 (c) not enough info (d) 13
17. 17.🧩 Arjun bought 3 kites and a bag for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹120 (b) ₹40 (c) not enough info (d) ₹117
18. 18.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
19. 19.🧩 Tara bought 2 markers and a water bottle for ₹140 in all. Each marker cost the same. What did one marker cost? (a) ₹70 (b) ₹138 (c) not enough info (d) ₹140
20. 20.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
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.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
23. 23.🧩 Meera is 10 years old. Nisha is older than Meera. How old is Nisha? (a) 15 (b) not enough info (c) 12 (d) 11
24. 24.🧩 Vihaan bought 3 mangoes for ₹135 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹50 (c) ₹45 (d) ₹135
25. 25.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
26. 26.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
27. 27.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
28. 28.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) not enough info (b) 7 PM (c) 3 PM (d) 6 PM
29. 29.🧩 Aarav bought 6 mangoes and a bag for ₹210 in all. Each mango cost the same. What did one mango cost? (a) ₹204 (b) not enough info (c) ₹210 (d) ₹35
30. 30.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
31. 31.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
32. 32.🧩 Kabir bought 6 notebooks and a lunch box for ₹130 in all. Each notebook cost the same. What did one notebook cost? (a) ₹124 (b) ₹130 (c) ₹21 (d) not enough info
33. 33.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 5 PM (c) not enough info (d) 3 PM
34. 34.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 6 PM (d) 4 PM
35. 35.🧩 Diya is 6 years old. Ananya is 9 years older than Diya. How old is Ananya? (a) 9 (b) not enough info (c) 15 (d) 16
36. 36.🧩 Arjun is 7 years old. Diya is older than Arjun. How old is Diya? (a) 12 (b) 9 (c) 8 (d) not enough info
37. 37.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
38. 38.🧩 Saanvi bought 2 markers and a lunch box for ₹140 in all. Each marker cost the same. What did one marker cost? (a) ₹140 (b) ₹70 (c) ₹138 (d) not enough info
39. 39.🧩 A box has 8 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 13 (b) 45 (c) not enough info (d) 40
40. 40.🧩 A box has 5 rows of guavas, with 7 in each row. How many guavas are in the box? (a) not enough info (b) 12 (c) 35 (d) 42

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