Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 24 · 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.🧩 Vihaan bought 6 notebooks and a cap for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹114 (b) ₹20 (c) ₹120 (d) not enough info
2. 2.🧩 Ishaan bought 5 markers for ₹300 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹60 (c) ₹300 (d) ₹65
3. 3.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 4 PM (c) 5 PM (d) not enough info
4. 4.🧩 Diya bought 6 balls for ₹240 in all. Each ball cost the same. What did one ball cost? (a) ₹240 (b) ₹40 (c) ₹45 (d) not enough info
5. 5.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
6. 6.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
7. 7.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) guessing (d) asking your pet
8. 8.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 8 PM (b) not enough info (c) 9 PM (d) 6 PM
9. 9.🧩 Diya bought 2 markers and a cap for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹118 (b) not enough info (c) ₹120 (d) ₹60
10. 10.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) what facts are given (d) the page number
11. 11.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a loud opinion (d) a guess
12. 12.🧩 A box has 7 rows of apples, with 8 in each row. How many apples are in the box? (a) 64 (b) not enough info (c) 56 (d) 15
13. 13.🧩 A box has 8 rows of eggs, with 9 in each row. How many eggs are in the box? (a) not enough info (b) 17 (c) 81 (d) 72
14. 14.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
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.🧩 Kabir bought 5 markers for ₹75 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹15 (c) ₹75 (d) ₹20
17. 17.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
18. 18.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
19. 19.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
20. 20.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
21. 21.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) that one dog barked (d) dogs hate you
22. 22.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
23. 23.🧩 Rohan is 12 years old. Tara is 5 years older than Rohan. How old is Tara? (a) 5 (b) not enough info (c) 18 (d) 17
24. 24.🧩 Kabir bought 6 mangoes for ₹240 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹240 (c) ₹45 (d) ₹40
25. 25.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 6 (b) 12 (c) not enough info (d) 60
26. 26.🧩 A box has 3 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) not enough info (b) 12 (c) 36 (d) 27
27. 27.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) 5 PM (d) not enough info
28. 28.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 3 PM (c) 5 PM (d) not enough info
29. 29.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
30. 30.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 3 PM
31. 31.🧩 Diya is 6 years old. Meera is older than Diya. How old is Meera? (a) 7 (b) not enough info (c) 11 (d) 8
32. 32.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
33. 33.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
34. 34.🧩 Diya is 6 years old. Meera is 8 years older than Diya. How old is Meera? (a) 15 (b) not enough info (c) 14 (d) 8
35. 35.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) 16 (b) 80 (c) not enough info (d) 8
36. 36.🧩 Ananya is 9 years old. Arjun is 3 years older than Ananya. How old is Arjun? (a) 13 (b) not enough info (c) 12 (d) 3
37. 37.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
38. 38.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 10 (b) 50 (c) not enough info (d) 5
39. 39.🧩 Vihaan is 8 years old. Tara is older than Vihaan. How old is Tara? (a) 13 (b) 10 (c) 9 (d) not enough info
40. 40.🧩 Ananya bought 4 markers for ₹40 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹15 (c) ₹40 (d) ₹10

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