Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 490 · 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.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 7 PM (c) 3 PM (d) not enough info
2. 2.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 4 (b) 40 (c) not enough info (d) 8
3. 3.🥭 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
4. 4.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) not enough info (b) 5 PM (c) 4 PM (d) 3 PM
5. 5.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
6. 6.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) your handwriting (d) the page number
7. 7.🧩 Ishaan bought 2 notebooks for ₹20 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) not enough info (c) ₹10 (d) ₹15
8. 8.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) a rumour (d) facts that support it
9. 9.🧩 Nisha is 7 years old. Meera is older than Nisha. How old is Meera? (a) 9 (b) 8 (c) 12 (d) not enough info
10. 10.🧩 Kabir is 11 years old. Vihaan is 9 years older than Kabir. How old is Vihaan? (a) not enough info (b) 21 (c) 20 (d) 9
11. 11.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
12. 12.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
13. 13.🧩 Vihaan is 9 years old. Kabir is 8 years older than Vihaan. How old is Kabir? (a) 18 (b) not enough info (c) 8 (d) 17
14. 14.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to be sure of results (d) to waste time
15. 15.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
16. 16.🧩 Diya bought 4 markers and a bag for ₹130 in all. Each marker cost the same. What did one marker cost? (a) ₹32 (b) ₹126 (c) ₹130 (d) not enough info
17. 17.🧩 A box has 7 rows of eggs, with 5 in each row. How many eggs are in the box? (a) not enough info (b) 12 (c) 40 (d) 35
18. 18.🧩 Ananya is 8 years old. Ishaan is 7 years older than Ananya. How old is Ishaan? (a) not enough info (b) 7 (c) 15 (d) 16
19. 19.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 8 PM (c) not enough info (d) 7 PM
20. 20.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
21. 21.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
22. 22.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) 6 PM (d) not enough info
23. 23.🧩 Diya is 8 years old. Meera is older than Diya. How old is Meera? (a) 9 (b) 13 (c) not enough info (d) 10
24. 24.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 9 PM
25. 25.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) asking the whole class (d) guessing
26. 26.🧩 Saanvi bought 4 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) ₹60 (b) ₹20 (c) not enough info (d) ₹15
27. 27.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) all dogs are mean (d) dogs hate you
28. 28.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
29. 29.🧩 Arjun is 8 years old. Saanvi is 9 years older than Arjun. How old is Saanvi? (a) 9 (b) not enough info (c) 18 (d) 17
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.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 4 PM (c) 5 PM (d) 2 PM
32. 32.🧩 Tara bought 2 notebooks for ₹40 in all. Each notebook cost the same. What did one notebook cost? (a) ₹25 (b) not enough info (c) ₹20 (d) ₹40
33. 33.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
34. 34.🧩 A box has 3 rows of oranges, with 9 in each row. How many oranges are in the box? (a) 12 (b) 36 (c) 27 (d) not enough info
35. 35.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
36. 36.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
37. 37.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) 5 PM (d) not enough info
38. 38.🧩 Saanvi is 8 years old. Vihaan is older than Saanvi. How old is Vihaan? (a) 13 (b) 10 (c) 9 (d) not enough info
39. 39.🧩 Saanvi is 7 years old. Diya is 4 years older than Saanvi. How old is Diya? (a) not enough info (b) 12 (c) 4 (d) 11
40. 40.🧩 Diya bought 4 markers and a cap for ₹160 in all. Each marker cost the same. What did one marker cost? (a) ₹160 (b) ₹40 (c) not enough info (d) ₹156

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