Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 521 · 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.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) facts that support it (d) a rumour
2. 2.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) yes, it is certain (c) no mango is sweet (d) no, check more
3. 3.🧩 Ishaan bought 2 markers and a cap for ₹70 in all. Each marker cost the same. What did one marker cost? (a) ₹70 (b) not enough info (c) ₹68 (d) ₹35
4. 4.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
5. 5.🧩 Nisha is 8 years old. Kabir is older than Nisha. How old is Kabir? (a) not enough info (b) 10 (c) 9 (d) 13
6. 6.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
7. 7.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
8. 8.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
9. 9.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking your pet (c) guessing (d) asking one friend
10. 10.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 9 PM (c) 7 PM (d) not enough info
11. 11.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) 14 (b) not enough info (c) 70 (d) 7
12. 12.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
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.🧩 Kabir bought 2 markers for ₹70 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹35 (c) ₹40 (d) ₹70
15. 15.🧩 Meera bought 4 markers and a cap for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹120 (b) ₹30 (c) not enough info (d) ₹116
16. 16.🧩 A box has 4 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 9 (b) not enough info (c) 20 (d) 25
17. 17.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
18. 18.🧩 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
19. 19.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) 5 PM (d) not enough info
20. 20.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
21. 21.🐕 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
22. 22.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
23. 23.🧩 Aarav bought 3 kites for ₹90 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹30 (c) ₹90 (d) ₹35
24. 24.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 6 PM (d) 5 PM
25. 25.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
26. 26.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
27. 27.🧩 Ishaan bought 5 markers for ₹150 in all. Each marker cost the same. What did one marker cost? (a) ₹150 (b) ₹35 (c) not enough info (d) ₹30
28. 28.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) 60 (b) not enough info (c) 12 (d) 6
29. 29.🧩 Diya bought 3 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) ₹20 (c) not enough info (d) ₹25
30. 30.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
31. 31.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
32. 32.🧩 Ishaan is 6 years old. Nisha is older than Ishaan. How old is Nisha? (a) 11 (b) 7 (c) not enough info (d) 8
33. 33.🧩 Vihaan is 9 years old. Rohan is 2 years older than Vihaan. How old is Rohan? (a) 2 (b) not enough info (c) 12 (d) 11
34. 34.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
35. 35.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
36. 36.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 5 PM (d) 3 PM
37. 37.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 5 (b) 50 (c) 10 (d) not enough info
38. 38.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) not enough info (b) 6 PM (c) 7 PM (d) 8 PM
39. 39.🧩 Tara bought 2 balls for ₹30 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹30 (c) ₹20 (d) ₹15
40. 40.🧩 Aarav is 9 years old. Nisha is 2 years older than Aarav. How old is Nisha? (a) not enough info (b) 12 (c) 11 (d) 2

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