Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 693 · 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 and lasts 1 hour. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 6 PM
2. 2.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
3. 3.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 5 PM (c) not enough info (d) 6 PM
4. 4.🧩 Diya bought 2 markers and a bag for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) ₹120 (c) ₹118 (d) not enough info
5. 5.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to waste time (d) to be sure of results
6. 6.🧩 Saanvi is 11 years old. Rohan is older than Saanvi. How old is Rohan? (a) 12 (b) 13 (c) not enough info (d) 16
7. 7.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion
8. 8.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 6 (b) not enough info (c) 12 (d) 60
9. 9.🧩 Aarav bought 6 kites for ₹90 in all. Each kite cost the same. What did one kite cost? (a) ₹20 (b) not enough info (c) ₹15 (d) ₹90
10. 10.🧩 Aarav is 7 years old. Tara is older than Aarav. How old is Tara? (a) not enough info (b) 12 (c) 8 (d) 9
11. 11.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
12. 12.🧩 A box has 8 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) not enough info (b) 40 (c) 13 (d) 45
13. 13.🧩 Vihaan bought 3 markers for ₹30 in all. Each marker cost the same. What did one marker cost? (a) ₹10 (b) not enough info (c) ₹30 (d) ₹15
14. 14.🧩 Meera is 10 years old. Rohan is older than Meera. How old is Rohan? (a) 11 (b) 15 (c) 12 (d) not enough info
15. 15.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
16. 16.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
17. 17.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
18. 18.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
19. 19.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
20. 20.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
21. 21.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
22. 22.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking your pet (c) asking one friend (d) guessing
23. 23.🧩 Rohan is 6 years old. Arjun is 7 years older than Rohan. How old is Arjun? (a) 7 (b) 14 (c) not enough info (d) 13
24. 24.🧩 Vihaan is 9 years old. Aarav is 4 years older than Vihaan. How old is Aarav? (a) 4 (b) not enough info (c) 14 (d) 13
25. 25.🧩 A box has 7 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 14 (b) not enough info (c) 49 (d) 56
26. 26.🧩 A box has 3 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 28 (b) 10 (c) 21 (d) not enough info
27. 27.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
28. 28.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
29. 29.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 3 PM (c) not enough info (d) 4 PM
30. 30.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
31. 31.🧩 Aarav bought 4 notebooks and a bag for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) ₹150 (b) ₹146 (c) not enough info (d) ₹37
32. 32.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
33. 33.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 4 PM (d) 5 PM
34. 34.🧩 Kabir is 8 years old. Tara is older than Kabir. How old is Tara? (a) not enough info (b) 9 (c) 13 (d) 10
35. 35.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
36. 36.🧩 Ananya is 11 years old. Meera is 2 years older than Ananya. How old is Meera? (a) 2 (b) 14 (c) 13 (d) not enough info
37. 37.🧩 A box has 7 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 12 (b) 40 (c) not enough info (d) 35
38. 38.🧩 Rohan bought 2 balls and a cap for ₹180 in all. Each ball cost the same. What did one ball cost? (a) ₹180 (b) ₹90 (c) not enough info (d) ₹178
39. 39.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) all dogs are mean (d) never see dogs
40. 40.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) not enough info (b) 10 (c) 50 (d) 5

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