Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 682 · 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.🥭 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) no, check more (c) yes, it is certain (d) no mango is sweet
2. 2.🧩 Ananya is 12 years old. Arjun is older than Ananya. How old is Arjun? (a) 17 (b) 13 (c) not enough info (d) 14
3. 3.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
4. 4.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
5. 5.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 3 PM
6. 6.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
7. 7.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
8. 8.🧩 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
9. 9.🧩 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
10. 10.🧩 Rohan is 10 years old. Ananya is 3 years older than Rohan. How old is Ananya? (a) 14 (b) 3 (c) 13 (d) not enough info
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.🧩 Meera is 11 years old. Diya is 4 years older than Meera. How old is Diya? (a) 4 (b) not enough info (c) 16 (d) 15
13. 13.🧩 Kabir bought 5 notebooks for ₹75 in all. Each notebook cost the same. What did one notebook cost? (a) ₹75 (b) ₹20 (c) ₹15 (d) not enough info
14. 14.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
15. 15.🧩 Ananya bought 2 mangoes for ₹120 in all. Each mango cost the same. What did one mango cost? (a) ₹65 (b) ₹120 (c) ₹60 (d) not enough info
16. 16.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) not enough info (b) 14 (c) 7 (d) 70
17. 17.🧩 Kabir bought 4 balls and a cap for ₹200 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹50 (c) ₹200 (d) ₹196
18. 18.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
19. 19.🧩 Diya bought 2 mangoes and a bag for ₹150 in all. Each mango cost the same. What did one mango cost? (a) ₹148 (b) ₹150 (c) not enough info (d) ₹75
20. 20.🧩 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
21. 21.🧩 Nisha is 10 years old. Arjun is 4 years older than Nisha. How old is Arjun? (a) 15 (b) not enough info (c) 4 (d) 14
22. 22.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 9 (b) 90 (c) 18 (d) not enough info
23. 23.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 2 PM (d) 3 PM
24. 24.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
25. 25.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 4 (b) 8 (c) not enough info (d) 40
26. 26.🧩 Vihaan is 11 years old. Ishaan is 8 years older than Vihaan. How old is Ishaan? (a) 20 (b) not enough info (c) 19 (d) 8
27. 27.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
28. 28.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) that one dog barked (d) all dogs are mean
29. 29.📝 What does “evidence” mean? (a) a loud opinion (b) facts that support it (c) a guess (d) a rumour
30. 30.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
31. 31.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
32. 32.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only
33. 33.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 7 PM
34. 34.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
35. 35.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 5 PM (c) 4 PM (d) not enough info
36. 36.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
37. 37.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
38. 38.📊 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
39. 39.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
40. 40.🧩 A box has 3 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) not enough info (b) 12 (c) 27 (d) 36

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