Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 565 · 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.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
2. 2.🧩 Meera bought 4 notebooks for ₹140 in all. Each notebook cost the same. What did one notebook cost? (a) ₹140 (b) ₹35 (c) ₹40 (d) not enough info
3. 3.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
4. 4.🧩 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
5. 5.🥭 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) no mango is sweet (c) yes, it is certain (d) yes, mangoes match
6. 6.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
7. 7.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
8. 8.🧩 Before solving a word problem, first check… (a) the colour of ink (b) the page number (c) what facts are given (d) your handwriting
9. 9.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 4 PM
10. 10.🧩 A box has 6 rows of apples, with 7 in each row. How many apples are in the box? (a) not enough info (b) 49 (c) 13 (d) 42
11. 11.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 10 (b) 50 (c) 5 (d) not enough info
12. 12.🧩 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
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.🧩 Vihaan bought 6 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) ₹15 (b) ₹60 (c) not enough info (d) ₹10
15. 15.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
16. 16.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
17. 17.🧩 Ishaan bought 4 markers for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹180 (b) ₹45 (c) not enough info (d) ₹50
18. 18.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
19. 19.🧩 Aarav is 10 years old. Meera is older than Aarav. How old is Meera? (a) 12 (b) not enough info (c) 15 (d) 11
20. 20.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
21. 21.🧩 Nisha bought 4 markers and a cap for ₹220 in all. Each marker cost the same. What did one marker cost? (a) ₹216 (b) ₹220 (c) ₹55 (d) not enough info
22. 22.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) a guess (d) facts that support it
23. 23.🧩 Kabir bought 6 pens and a cap for ₹370 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹370 (c) ₹61 (d) ₹364
24. 24.🧩 Meera is 9 years old. Rohan is 6 years older than Meera. How old is Rohan? (a) 16 (b) 15 (c) not enough info (d) 6
25. 25.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking your pet (d) asking one friend
26. 26.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) dogs hate you (d) that one dog barked
27. 27.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
28. 28.🧩 Saanvi is 6 years old. Diya is older than Saanvi. How old is Diya? (a) 7 (b) 8 (c) 11 (d) not enough info
29. 29.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
30. 30.🧩 Rohan bought 3 pens for ₹75 in all. Each pen cost the same. What did one pen cost? (a) ₹75 (b) ₹30 (c) ₹25 (d) not enough info
31. 31.🧩 Saanvi bought 5 kites for ₹275 in all. Each kite cost the same. What did one kite cost? (a) ₹55 (b) ₹275 (c) ₹60 (d) not enough info
32. 32.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
33. 33.🧩 Kabir bought 3 notebooks and a water bottle for ₹225 in all. Each notebook cost the same. What did one notebook cost? (a) ₹75 (b) ₹225 (c) not enough info (d) ₹222
34. 34.🧩 Nisha bought 6 markers and a bag for ₹130 in all. Each marker cost the same. What did one marker cost? (a) ₹124 (b) ₹130 (c) ₹21 (d) not enough info
35. 35.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 6 PM (c) 10 PM (d) not enough info
36. 36.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
37. 37.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 7 PM (c) 8 PM (d) not enough info
38. 38.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
39. 39.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
40. 40.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

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