Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 646 · 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. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 5 PM
2. 2.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
3. 3.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
4. 4.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
5. 5.🧩 A box has 7 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 63 (b) 16 (c) 72 (d) not enough info
6. 6.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) not enough info (b) 10 (c) 50 (d) 5
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.🧩 Saanvi bought 2 markers for ₹80 in all. Each marker cost the same. What did one marker cost? (a) ₹40 (b) not enough info (c) ₹45 (d) ₹80
9. 9.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
10. 10.🧩 Meera is 9 years old. Vihaan is 9 years older than Meera. How old is Vihaan? (a) not enough info (b) 19 (c) 18 (d) 9
11. 11.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the page number (d) the colour of ink
12. 12.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 3 PM (c) not enough info (d) 4 PM
13. 13.🧩 Aarav is 6 years old. Vihaan is older than Aarav. How old is Vihaan? (a) not enough info (b) 11 (c) 7 (d) 8
14. 14.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
15. 15.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
16. 16.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
17. 17.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
18. 18.🧩 Aarav bought 4 markers and a water bottle for ₹240 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) ₹236 (c) ₹240 (d) not enough info
19. 19.📊 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
20. 20.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) a loud opinion (d) facts that support it
21. 21.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
22. 22.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) all dogs are mean (d) that one dog barked
23. 23.🧩 Ishaan is 10 years old. Vihaan is older than Ishaan. How old is Vihaan? (a) 12 (b) not enough info (c) 11 (d) 15
24. 24.🧩 Meera bought 3 markers for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹120 (b) not enough info (c) ₹40 (d) ₹45
25. 25.🧩 Kabir is 9 years old. Aarav is older than Kabir. How old is Aarav? (a) 11 (b) 10 (c) 14 (d) not enough info
26. 26.🥭 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) no mango is sweet (d) yes, it is certain
27. 27.🧩 A box has 7 rows of apples, with 9 in each row. How many apples are in the box? (a) 72 (b) 16 (c) not enough info (d) 63
28. 28.🧩 A box has 6 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) not enough info (b) 24 (c) 10 (d) 28
29. 29.🧩 Ishaan bought 6 balls and a water bottle for ₹360 in all. Each ball cost the same. What did one ball cost? (a) ₹360 (b) not enough info (c) ₹354 (d) ₹60
30. 30.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 8 PM (c) 7 PM (d) not enough info
31. 31.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
32. 32.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 3 PM
33. 33.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to be sure of results (d) to change answers
34. 34.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
35. 35.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
36. 36.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) not enough info (c) 2 PM (d) 4 PM
37. 37.🧩 A box has 3 rows of apples, with 7 in each row. How many apples are in the box? (a) not enough info (b) 28 (c) 21 (d) 10
38. 38.🧩 Aarav is 12 years old. Diya is older than Aarav. How old is Diya? (a) not enough info (b) 14 (c) 13 (d) 17
39. 39.🧩 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
40. 40.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 6 PM (c) 3 PM (d) not enough info

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