Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 699 · 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.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) 70 (b) not enough info (c) 14 (d) 7
2. 2.🧩 Saanvi bought 6 markers for ₹300 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) not enough info (c) ₹300 (d) ₹55
3. 3.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
4. 4.🧩 Nisha bought 2 balls for ₹120 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹120 (c) ₹60 (d) ₹65
5. 5.🥭 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 mango is sweet (c) no, check more (d) yes, mangoes match
6. 6.🧩 Rohan is 11 years old. Tara is older than Rohan. How old is Tara? (a) 12 (b) 16 (c) not enough info (d) 13
7. 7.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
8. 8.🧩 Diya is 10 years old. Ishaan is 5 years older than Diya. How old is Ishaan? (a) 5 (b) 15 (c) 16 (d) not enough info
9. 9.🧩 Vihaan bought 2 notebooks and a cap for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹45 (b) ₹90 (c) ₹88 (d) not enough info
10. 10.🧩 Meera bought 4 markers and a water bottle for ₹240 in all. Each marker cost the same. What did one marker cost? (a) ₹236 (b) not enough info (c) ₹240 (d) ₹60
11. 11.🧩 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
12. 12.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
13. 13.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 2 PM (c) 4 PM (d) not enough info
14. 14.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) your handwriting (d) the colour of ink
15. 15.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
16. 16.🧩 A box has 4 rows of oranges, with 8 in each row. How many oranges are in the box? (a) 40 (b) not enough info (c) 32 (d) 12
17. 17.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
18. 18.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
19. 19.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
20. 20.🧩 Diya bought 5 notebooks for ₹125 in all. Each notebook cost the same. What did one notebook cost? (a) ₹125 (b) ₹25 (c) ₹30 (d) not enough info
21. 21.🧩 Diya bought 3 notebooks for ₹45 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) not enough info (c) ₹20 (d) ₹45
22. 22.🧩 Meera bought 2 balls for ₹20 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹15 (c) ₹10 (d) ₹20
23. 23.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
24. 24.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) never see dogs (d) that one dog barked
25. 25.🧩 Kabir bought 4 notebooks for ₹200 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) ₹200 (c) not enough info (d) ₹55
26. 26.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
27. 27.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
28. 28.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) 3 PM (d) not enough info
29. 29.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
30. 30.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 8 PM (b) 9 PM (c) not enough info (d) 6 PM
31. 31.🧩 Vihaan bought 5 pens and a cap for ₹140 in all. Each pen cost the same. What did one pen cost? (a) ₹135 (b) not enough info (c) ₹140 (d) ₹28
32. 32.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
33. 33.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
34. 34.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) facts that support it (d) a rumour
35. 35.🧩 Diya bought 4 markers and a lunch box for ₹190 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹47 (c) ₹186 (d) ₹190
36. 36.🧩 Meera is 6 years old. Ishaan is 7 years older than Meera. How old is Ishaan? (a) not enough info (b) 7 (c) 14 (d) 13
37. 37.🧩 Tara bought 4 balls and a lunch box for ₹110 in all. Each ball cost the same. What did one ball cost? (a) ₹106 (b) ₹110 (c) not enough info (d) ₹27
38. 38.🧩 Arjun bought 4 mangoes for ₹80 in all. Each mango cost the same. What did one mango cost? (a) ₹80 (b) not enough info (c) ₹20 (d) ₹25
39. 39.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
40. 40.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 5 PM (b) not enough info (c) 9 PM (d) 8 PM

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