Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 353 · 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 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) 8 PM (c) not enough info (d) 7 PM
2. 2.🧩 Ananya is 11 years old. Kabir is 9 years older than Ananya. How old is Kabir? (a) 21 (b) not enough info (c) 20 (d) 9
3. 3.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
4. 4.🧩 A box has 6 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 10 (b) 28 (c) 24 (d) not enough info
5. 5.🧩 Arjun is 9 years old. Vihaan is older than Arjun. How old is Vihaan? (a) 11 (b) 14 (c) 10 (d) not enough info
6. 6.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) 9 PM (d) not enough info
7. 7.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) the page number (d) what facts are given
8. 8.🧩 Aarav bought 5 notebooks and a water bottle for ₹295 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹290 (c) ₹59 (d) ₹295
9. 9.🧩 Meera bought 2 mangoes for ₹100 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹100 (c) ₹50 (d) ₹55
10. 10.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a guess (d) a rumour
11. 11.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
12. 12.🧩 Saanvi bought 5 pens for ₹300 in all. Each pen cost the same. What did one pen cost? (a) ₹300 (b) ₹65 (c) ₹60 (d) not enough info
13. 13.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
14. 14.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
15. 15.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 4 PM (c) not enough info (d) 5 PM
16. 16.🧩 A box has 3 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 24 (b) 18 (c) 9 (d) not enough info
17. 17.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) to waste time (d) for fun only
18. 18.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
19. 19.📊 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
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.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
22. 22.🧩 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
23. 23.🧩 Ishaan is 12 years old. Diya is 5 years older than Ishaan. How old is Diya? (a) 18 (b) not enough info (c) 5 (d) 17
24. 24.🧩 Ishaan is 6 years old. Diya is 6 years older than Ishaan. How old is Diya? (a) not enough info (b) 6 (c) 13 (d) 12
25. 25.🧩 A box has 5 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 25 (b) not enough info (c) 30 (d) 10
26. 26.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
27. 27.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 5 (b) 50 (c) 10 (d) not enough info
28. 28.🧩 Saanvi is 11 years old. Ishaan is older than Saanvi. How old is Ishaan? (a) 13 (b) 12 (c) 16 (d) not enough info
29. 29.🧩 Vihaan bought 6 balls and a water bottle for ₹340 in all. Each ball cost the same. What did one ball cost? (a) ₹340 (b) ₹334 (c) ₹56 (d) not enough info
30. 30.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
31. 31.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) 7 (b) 70 (c) 14 (d) not enough info
32. 32.🧩 Ishaan bought 5 markers and a cap for ₹215 in all. Each marker cost the same. What did one marker cost? (a) ₹210 (b) ₹43 (c) not enough info (d) ₹215
33. 33.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 7 PM (d) 6 PM
34. 34.🧩 Tara bought 5 balls for ₹50 in all. Each ball cost the same. What did one ball cost? (a) ₹10 (b) not enough info (c) ₹50 (d) ₹15
35. 35.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
36. 36.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, it is certain (c) yes, mangoes match (d) no, check more
37. 37.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
38. 38.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) that one dog barked (d) never see dogs
39. 39.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) 5 PM (c) not enough info (d) 6 PM
40. 40.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False

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