Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 747 · 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: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
2. 2.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
3. 3.🧩 Rohan is 12 years old. Ananya is 5 years older than Rohan. How old is Ananya? (a) 18 (b) 5 (c) 17 (d) not enough info
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.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
6. 6.🧩 Aarav bought 6 markers and a cap for ₹370 in all. Each marker cost the same. What did one marker cost? (a) ₹364 (b) ₹61 (c) ₹370 (d) not enough info
7. 7.🧩 Saanvi bought 6 markers for ₹240 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹40 (c) ₹240 (d) ₹45
8. 8.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
9. 9.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 4 PM
10. 10.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
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) yes, mangoes match (c) no mango is sweet (d) no, check more
12. 12.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
13. 13.🧩 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
14. 14.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
15. 15.🧩 Diya bought 4 mangoes and a water bottle for ₹220 in all. Each mango cost the same. What did one mango cost? (a) ₹220 (b) ₹55 (c) not enough info (d) ₹216
16. 16.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 4 PM (c) 2 PM (d) not enough info
17. 17.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 5 (b) 10 (c) 50 (d) not enough info
18. 18.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking one friend (d) asking the whole class
19. 19.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
20. 20.🧩 Kabir bought 3 balls for ₹150 in all. Each ball cost the same. What did one ball cost? (a) ₹55 (b) not enough info (c) ₹50 (d) ₹150
21. 21.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion
22. 22.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 6 PM (c) 7 PM (d) not enough info
23. 23.🧩 Arjun is 6 years old. Nisha is 4 years older than Arjun. How old is Nisha? (a) not enough info (b) 10 (c) 11 (d) 4
24. 24.🧩 Meera bought 4 kites and a bag for ₹170 in all. Each kite cost the same. What did one kite cost? (a) ₹42 (b) ₹166 (c) ₹170 (d) not enough info
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.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) all dogs are mean (c) dogs hate you (d) never see dogs
27. 27.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
28. 28.🧩 Meera is 7 years old. Aarav is 3 years older than Meera. How old is Aarav? (a) not enough info (b) 3 (c) 11 (d) 10
29. 29.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
30. 30.🧩 A box has 8 rows of apples, with 9 in each row. How many apples are in the box? (a) not enough info (b) 17 (c) 81 (d) 72
31. 31.🧩 Arjun bought 5 mangoes for ₹150 in all. Each mango cost the same. What did one mango cost? (a) ₹35 (b) ₹30 (c) ₹150 (d) not enough info
32. 32.🧩 Diya is 7 years old. Aarav is 2 years older than Diya. How old is Aarav? (a) 9 (b) 10 (c) 2 (d) not enough info
33. 33.🧩 Diya bought 2 pens and a water bottle for ₹110 in all. Each pen cost the same. What did one pen cost? (a) ₹108 (b) not enough info (c) ₹110 (d) ₹55
34. 34.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
35. 35.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
36. 36.🧩 Ananya bought 6 markers and a bag for ₹440 in all. Each marker cost the same. What did one marker cost? (a) ₹73 (b) ₹434 (c) ₹440 (d) not enough info
37. 37.🧩 Diya bought 4 pens for ₹140 in all. Each pen cost the same. What did one pen cost? (a) ₹140 (b) ₹40 (c) not enough info (d) ₹35
38. 38.🧩 Rohan is 7 years old. Saanvi is older than Rohan. How old is Saanvi? (a) 8 (b) not enough info (c) 9 (d) 12
39. 39.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 5 PM (c) 2 PM (d) not enough info
40. 40.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) not enough info (c) 8 PM (d) 7 PM

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