Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 505 · 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.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) a loud opinion (d) facts that support it
2. 2.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 4 PM (c) not enough info (d) 6 PM
3. 3.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 9 PM (b) not enough info (c) 10 PM (d) 6 PM
4. 4.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) never see dogs (d) all dogs are mean
5. 5.🧩 A box has 3 rows of apples, with 9 in each row. How many apples are in the box? (a) 36 (b) not enough info (c) 12 (d) 27
6. 6.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
7. 7.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
8. 8.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
9. 9.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
10. 10.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
11. 11.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
12. 12.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
13. 13.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) 8 PM (d) not enough info
14. 14.🧩 A box has 8 rows of apples, with 4 in each row. How many apples are in the box? (a) 12 (b) 32 (c) not enough info (d) 36
15. 15.🥭 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 mango is sweet (c) yes, it is certain (d) no, check more
16. 16.🧩 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
17. 17.🧩 Diya bought 5 markers and a bag for ₹290 in all. Each marker cost the same. What did one marker cost? (a) ₹290 (b) ₹285 (c) not enough info (d) ₹58
18. 18.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
19. 19.🧩 Before solving a word problem, first check… (a) the page number (b) what facts are given (c) the colour of ink (d) your handwriting
20. 20.🧩 Vihaan is 10 years old. Tara is 5 years older than Vihaan. How old is Tara? (a) not enough info (b) 16 (c) 15 (d) 5
21. 21.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) not enough info (b) 7 (c) 70 (d) 14
22. 22.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
23. 23.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) not enough info (b) 8 PM (c) 7 PM (d) 6 PM
24. 24.🧩 Diya bought 5 pens and a lunch box for ₹180 in all. Each pen cost the same. What did one pen cost? (a) ₹36 (b) ₹180 (c) ₹175 (d) not enough info
25. 25.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
26. 26.🧩 Saanvi bought 3 kites for ₹105 in all. Each kite cost the same. What did one kite cost? (a) ₹105 (b) ₹35 (c) ₹40 (d) not enough info
27. 27.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
28. 28.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
29. 29.🧩 Nisha bought 2 kites for ₹30 in all. Each kite cost the same. What did one kite cost? (a) ₹20 (b) ₹30 (c) not enough info (d) ₹15
30. 30.🧩 Nisha is 12 years old. Ananya is older than Nisha. How old is Ananya? (a) 17 (b) 14 (c) 13 (d) not enough info
31. 31.🧩 Ananya bought 3 notebooks and a lunch box for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) ₹80 (b) not enough info (c) ₹77 (d) ₹26
32. 32.🧩 Ananya bought 5 mangoes for ₹150 in all. Each mango cost the same. What did one mango cost? (a) ₹35 (b) ₹150 (c) not enough info (d) ₹30
33. 33.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
34. 34.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 5 PM (c) not enough info (d) 2 PM
35. 35.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
36. 36.🧩 Ananya bought 2 pens and a lunch box for ₹80 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹78 (c) ₹40 (d) ₹80
37. 37.🧩 Saanvi bought 4 mangoes and a bag for ₹130 in all. Each mango cost the same. What did one mango cost? (a) ₹130 (b) not enough info (c) ₹126 (d) ₹32
38. 38.🧩 Kabir is 11 years old. Ananya is 6 years older than Kabir. How old is Ananya? (a) not enough info (b) 6 (c) 17 (d) 18
39. 39.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
40. 40.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True

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