Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 167 · 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.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to waste time (d) to change answers
2. 2.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
3. 3.🧩 A box has 3 rows of apples, with 7 in each row. How many apples are in the box? (a) 28 (b) 10 (c) not enough info (d) 21
4. 4.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
5. 5.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
6. 6.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 7 PM
7. 7.🧩 A box has 4 rows of eggs, with 8 in each row. How many eggs are in the box? (a) 32 (b) 40 (c) 12 (d) not enough info
8. 8.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 4 PM
9. 9.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
10. 10.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
11. 11.🧩 Ishaan bought 6 mangoes for ₹210 in all. Each mango cost the same. What did one mango cost? (a) ₹210 (b) not enough info (c) ₹40 (d) ₹35
12. 12.🧩 Kabir bought 6 mangoes for ₹120 in all. Each mango cost the same. What did one mango cost? (a) ₹120 (b) ₹25 (c) not enough info (d) ₹20
13. 13.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a loud opinion (d) a rumour
14. 14.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no, check more (c) no mango is sweet (d) yes, mangoes match
15. 15.🧩 Tara is 9 years old. Vihaan is 9 years older than Tara. How old is Vihaan? (a) 9 (b) not enough info (c) 18 (d) 19
16. 16.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
17. 17.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
18. 18.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 8 (b) 16 (c) 80 (d) not enough info
19. 19.🧩 Kabir bought 3 markers and a bag for ₹220 in all. Each marker cost the same. What did one marker cost? (a) ₹73 (b) ₹217 (c) not enough info (d) ₹220
20. 20.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
21. 21.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
22. 22.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 7 PM (c) not enough info (d) 6 PM
23. 23.🧩 Aarav bought 2 pens and a bag for ₹60 in all. Each pen cost the same. What did one pen cost? (a) ₹30 (b) ₹58 (c) not enough info (d) ₹60
24. 24.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
25. 25.🧩 Rohan is 6 years old. Kabir is older than Rohan. How old is Kabir? (a) 7 (b) 11 (c) not enough info (d) 8
26. 26.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
27. 27.🧩 Aarav bought 4 balls for ₹80 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹80 (c) ₹25 (d) ₹20
28. 28.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
29. 29.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 8 (b) not enough info (c) 40 (d) 4
30. 30.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
31. 31.🧩 Diya bought 4 notebooks for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) ₹180 (c) ₹45 (d) not enough info
32. 32.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
33. 33.🧩 Diya bought 3 markers for ₹30 in all. Each marker cost the same. What did one marker cost? (a) ₹30 (b) ₹15 (c) not enough info (d) ₹10
34. 34.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) never see dogs (c) dogs hate you (d) all dogs are mean
35. 35.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 4 PM
36. 36.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
37. 37.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) what facts are given (d) the colour of ink
38. 38.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 9 PM (c) 5 PM (d) not enough info
39. 39.🧩 Arjun is 11 years old. Kabir is older than Arjun. How old is Kabir? (a) not enough info (b) 12 (c) 13 (d) 16
40. 40.🧩 Rohan is 9 years old. Vihaan is older than Rohan. How old is Vihaan? (a) not enough info (b) 14 (c) 11 (d) 10

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