Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 602 · 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.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
2. 2.🐕 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
3. 3.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 10 (b) not enough info (c) 5 (d) 50
4. 4.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
5. 5.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 6 PM (c) 7 PM (d) not enough info
6. 6.🧩 Aarav bought 4 pens for ₹80 in all. Each pen cost the same. What did one pen cost? (a) ₹80 (b) ₹25 (c) not enough info (d) ₹20
7. 7.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 5 PM (c) 4 PM (d) not enough info
8. 8.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
9. 9.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
10. 10.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 6 PM
11. 11.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no, check more (c) yes, mangoes match (d) no mango is sweet
12. 12.🧩 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
13. 13.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
14. 14.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
15. 15.🧩 Aarav bought 2 notebooks and a bag for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹120 (b) not enough info (c) ₹60 (d) ₹118
16. 16.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) what facts are given (d) the page number
17. 17.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
18. 18.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
19. 19.📝 What does “evidence” mean? (a) a loud opinion (b) facts that support it (c) a guess (d) a rumour
20. 20.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to waste time (d) to change answers
21. 21.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
22. 22.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
23. 23.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) guessing (d) asking the whole class
24. 24.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
25. 25.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
26. 26.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 2 PM (c) 5 PM (d) not enough info
27. 27.🧩 A box has 7 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) 56 (b) 14 (c) not enough info (d) 49
28. 28.🧩 Kabir bought 5 markers and a lunch box for ₹130 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹26 (c) ₹130 (d) ₹125
29. 29.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
30. 30.🧩 Rohan bought 6 notebooks for ₹360 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) ₹65 (c) ₹360 (d) not enough info
31. 31.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
32. 32.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 8 (b) not enough info (c) 4 (d) 40
33. 33.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
34. 34.🧩 Ishaan bought 5 pens for ₹75 in all. Each pen cost the same. What did one pen cost? (a) ₹20 (b) ₹75 (c) ₹15 (d) not enough info
35. 35.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) 4 PM (c) not enough info (d) 3 PM
36. 36.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 2 PM
37. 37.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) 7 PM (d) not enough info
38. 38.🧩 Aarav bought 5 mangoes and a bag for ₹140 in all. Each mango cost the same. What did one mango cost? (a) ₹28 (b) ₹135 (c) ₹140 (d) not enough info
39. 39.🧩 Diya is 7 years old. Kabir is 6 years older than Diya. How old is Kabir? (a) 14 (b) 6 (c) not enough info (d) 13
40. 40.🧩 Kabir bought 3 balls for ₹150 in all. Each ball cost the same. What did one ball cost? (a) ₹55 (b) ₹150 (c) not enough info (d) ₹50

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