Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 839 · 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) no, check more (b) yes, mangoes match (c) yes, it is certain (d) no mango is sweet
2. 2.🧩 Ananya is 7 years old. Saanvi is older than Ananya. How old is Saanvi? (a) not enough info (b) 8 (c) 9 (d) 12
3. 3.🧩 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
4. 4.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
5. 5.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
6. 6.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
7. 7.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) not enough info (d) 6 PM
8. 8.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
9. 9.🧩 Kabir bought 4 mangoes and a water bottle for ₹100 in all. Each mango cost the same. What did one mango cost? (a) ₹25 (b) not enough info (c) ₹96 (d) ₹100
10. 10.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
11. 11.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 3 PM (b) not enough info (c) 4 PM (d) 2 PM
12. 12.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
13. 13.🧩 A box has 3 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 20 (b) 8 (c) 15 (d) not enough info
14. 14.🧩 Diya bought 4 kites and a lunch box for ₹130 in all. Each kite cost the same. What did one kite cost? (a) ₹126 (b) ₹32 (c) ₹130 (d) not enough info
15. 15.🧩 Kabir bought 4 mangoes for ₹80 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹25 (c) ₹80 (d) ₹20
16. 16.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to waste time (d) to change answers
17. 17.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 8 PM (d) 7 PM
18. 18.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
19. 19.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
20. 20.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
21. 21.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
22. 22.🧩 A box has 8 rows of apples, with 7 in each row. How many apples are in the box? (a) 15 (b) 56 (c) not enough info (d) 63
23. 23.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) dogs hate you (d) that one dog barked
24. 24.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
25. 25.🧩 A box has 8 rows of eggs, with 9 in each row. How many eggs are in the box? (a) 81 (b) not enough info (c) 17 (d) 72
26. 26.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
27. 27.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
28. 28.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
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) enough evidence (b) not enough evidence
31. 31.🧩 A box has 4 rows of oranges, with 5 in each row. How many oranges are in the box? (a) not enough info (b) 25 (c) 9 (d) 20
32. 32.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) asking one friend (d) guessing
33. 33.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
34. 34.🧩 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
35. 35.🧩 Rohan bought 4 markers for ₹80 in all. Each marker cost the same. What did one marker cost? (a) ₹80 (b) not enough info (c) ₹25 (d) ₹20
36. 36.🧩 Arjun is 8 years old. Ananya is older than Arjun. How old is Ananya? (a) 13 (b) 9 (c) 10 (d) not enough info
37. 37.🧩 Meera is 6 years old. Diya is 9 years older than Meera. How old is Diya? (a) 16 (b) 9 (c) not enough info (d) 15
38. 38.🧩 Nisha is 9 years old. Rohan is 7 years older than Nisha. How old is Rohan? (a) 17 (b) not enough info (c) 7 (d) 16
39. 39.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 7 PM (c) not enough info (d) 6 PM
40. 40.🧩 Diya bought 2 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) ₹20 (c) ₹30 (d) not enough info

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