Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 368 · 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? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
2. 2.🧩 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
3. 3.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
4. 4.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking one friend (d) asking the whole class
5. 5.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) 8 PM (d) not enough info
6. 6.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 50 (b) 10 (c) 5 (d) not enough info
7. 7.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 7 (b) 14 (c) 70 (d) not enough info
8. 8.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
9. 9.🧩 Tara is 9 years old. Kabir is older than Tara. How old is Kabir? (a) 10 (b) not enough info (c) 11 (d) 14
10. 10.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) not enough info (b) 16 (c) 8 (d) 80
11. 11.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
12. 12.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) not enough info (b) 6 PM (c) 7 PM (d) 4 PM
13. 13.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
14. 14.🥭 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, mangoes match (d) yes, it is certain
15. 15.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to waste time (d) to be sure of results
16. 16.🧩 Tara bought 2 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹120 (b) ₹65 (c) ₹60 (d) not enough info
17. 17.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) not enough info (b) 5 PM (c) 3 PM (d) 6 PM
18. 18.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
19. 19.🧩 Ishaan bought 5 notebooks and a cap for ₹360 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹360 (c) ₹355 (d) ₹72
20. 20.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
21. 21.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
22. 22.🧩 Diya bought 5 notebooks for ₹275 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) not enough info (c) ₹275 (d) ₹55
23. 23.🧩 Ishaan bought 5 markers and a cap for ₹300 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) not enough info (c) ₹300 (d) ₹295
24. 24.🧩 A box has 3 rows of apples, with 5 in each row. How many apples are in the box? (a) 8 (b) 15 (c) not enough info (d) 20
25. 25.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 50 (b) 10 (c) 5 (d) not enough info
26. 26.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
27. 27.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) facts that support it (d) a rumour
28. 28.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
29. 29.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
30. 30.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 5 PM
31. 31.🧩 Aarav bought 6 pens and a bag for ₹140 in all. Each pen cost the same. What did one pen cost? (a) ₹23 (b) ₹140 (c) not enough info (d) ₹134
32. 32.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
33. 33.🧩 Nisha is 9 years old. Meera is 2 years older than Nisha. How old is Meera? (a) 11 (b) not enough info (c) 12 (d) 2
34. 34.🧩 Nisha bought 5 pens for ₹100 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹20 (c) ₹100 (d) ₹25
35. 35.🧩 Saanvi bought 2 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) not enough info (c) ₹90 (d) ₹45
36. 36.🧩 Aarav is 10 years old. Saanvi is older than Aarav. How old is Saanvi? (a) not enough info (b) 15 (c) 12 (d) 11
37. 37.🧩 Rohan is 11 years old. Vihaan is older than Rohan. How old is Vihaan? (a) 13 (b) 16 (c) not enough info (d) 12
38. 38.🧩 Rohan is 10 years old. Vihaan is 4 years older than Rohan. How old is Vihaan? (a) 14 (b) not enough info (c) 4 (d) 15
39. 39.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
40. 40.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 6 PM

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