Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 124 · 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.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
2. 2.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
3. 3.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
4. 4.🧩 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
5. 5.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
6. 6.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 4 (b) 8 (c) 40 (d) not enough info
7. 7.🧩 Before solving a word problem, first check… (a) the page number (b) what facts are given (c) the colour of ink (d) your handwriting
8. 8.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 3 PM (b) 7 PM (c) 6 PM (d) not enough info
9. 9.🥭 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, it is certain (d) yes, mangoes match
10. 10.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
11. 11.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) to change answers (d) for fun only
12. 12.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
13. 13.🧩 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
14. 14.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
15. 15.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) dogs hate you (d) all dogs are mean
16. 16.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
17. 17.🧩 Arjun is 7 years old. Saanvi is older than Arjun. How old is Saanvi? (a) 8 (b) 9 (c) 12 (d) not enough info
18. 18.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 2 PM (c) 5 PM (d) 4 PM
19. 19.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) not enough info (b) 6 PM (c) 4 PM (d) 7 PM
20. 20.🧩 Aarav bought 3 pens for ₹30 in all. Each pen cost the same. What did one pen cost? (a) ₹30 (b) ₹15 (c) ₹10 (d) not enough info
21. 21.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 8 PM
22. 22.🧩 Kabir bought 2 notebooks and a cap for ₹70 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹68 (c) ₹35 (d) ₹70
23. 23.🧩 Arjun bought 2 pens and a cap for ₹80 in all. Each pen cost the same. What did one pen cost? (a) ₹40 (b) ₹80 (c) not enough info (d) ₹78
24. 24.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
25. 25.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
26. 26.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
27. 27.🧩 Nisha is 11 years old. Diya is older than Nisha. How old is Diya? (a) 12 (b) 16 (c) 13 (d) not enough info
28. 28.🧩 Vihaan is 12 years old. Arjun is older than Vihaan. How old is Arjun? (a) 13 (b) 17 (c) 14 (d) not enough info
29. 29.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 8 PM (c) 7 PM (d) not enough info
30. 30.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 9 PM
31. 31.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
32. 32.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) guessing (d) asking one friend
33. 33.🧩 A box has 3 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 21 (b) not enough info (c) 28 (d) 10
34. 34.🧩 Vihaan bought 5 mangoes for ₹200 in all. Each mango cost the same. What did one mango cost? (a) ₹200 (b) ₹45 (c) not enough info (d) ₹40
35. 35.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
36. 36.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
37. 37.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
38. 38.🧩 A box has 6 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 11 (b) 30 (c) not enough info (d) 35
39. 39.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) not enough info (b) 6 PM (c) 3 PM (d) 5 PM
40. 40.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True

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