Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 198 · 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.🧩 Ishaan bought 5 pens for ₹275 in all. Each pen cost the same. What did one pen cost? (a) ₹275 (b) ₹55 (c) not enough info (d) ₹60
2. 2.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
3. 3.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) no mango is sweet (c) yes, it is certain (d) yes, mangoes match
4. 4.🧩 Tara bought 3 markers and a water bottle for ₹75 in all. Each marker cost the same. What did one marker cost? (a) ₹72 (b) not enough info (c) ₹75 (d) ₹25
5. 5.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
6. 6.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 7 PM (d) 6 PM
7. 7.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
8. 8.🧩 Diya bought 2 pens and a lunch box for ₹170 in all. Each pen cost the same. What did one pen cost? (a) ₹168 (b) ₹85 (c) ₹170 (d) not enough info
9. 9.🧩 Ananya bought 4 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹25 (b) ₹100 (c) ₹30 (d) not enough info
10. 10.🧩 Meera bought 6 pens and a bag for ₹420 in all. Each pen cost the same. What did one pen cost? (a) ₹414 (b) ₹70 (c) ₹420 (d) not enough info
11. 11.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) that one dog barked (d) never see dogs
12. 12.🧩 A box has 3 rows of laddoos, with 6 in each row. How many laddoos are in the box? (a) 9 (b) 24 (c) not enough info (d) 18
13. 13.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) to change answers (d) for fun only
14. 14.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
15. 15.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
16. 16.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) not enough info (b) 4 PM (c) 3 PM (d) 5 PM
17. 17.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
18. 18.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 9 PM (c) 7 PM (d) 8 PM
19. 19.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
20. 20.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
21. 21.🧩 A box has 7 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 13 (b) not enough info (c) 42 (d) 48
22. 22.🧩 Meera bought 5 notebooks and a lunch box for ₹320 in all. Each notebook cost the same. What did one notebook cost? (a) ₹64 (b) ₹320 (c) not enough info (d) ₹315
23. 23.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) your handwriting (d) the colour of ink
24. 24.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
25. 25.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) a guess (d) facts that support it
26. 26.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 40 (b) 4 (c) not enough info (d) 8
27. 27.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
28. 28.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) asking your pet (d) guessing
29. 29.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
30. 30.🧩 A box has 8 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 16 (b) 72 (c) 64 (d) not enough info
31. 31.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
32. 32.🧩 Diya bought 3 pens and a lunch box for ₹180 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹177 (c) ₹180 (d) ₹60
33. 33.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 4 PM (c) 5 PM (d) 2 PM
34. 34.🧩 Kabir is 7 years old. Aarav is 3 years older than Kabir. How old is Aarav? (a) 3 (b) not enough info (c) 11 (d) 10
35. 35.🧩 Ishaan bought 3 notebooks for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) ₹150 (c) not enough info (d) ₹55
36. 36.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 4 (b) 40 (c) not enough info (d) 8
37. 37.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
38. 38.🧩 Nisha bought 5 markers and a cap for ₹230 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹46 (c) ₹230 (d) ₹225
39. 39.🧩 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
40. 40.🧩 Ananya bought 4 balls for ₹40 in all. Each ball cost the same. What did one ball cost? (a) ₹40 (b) ₹15 (c) ₹10 (d) not enough info

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