Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 743 · 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.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
2. 2.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 8 PM (c) not enough info (d) 5 PM
3. 3.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 10 PM (b) not enough info (c) 9 PM (d) 6 PM
4. 4.🥭 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, mangoes match (c) yes, it is certain (d) no, check more
5. 5.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) a guess (d) facts that support it
6. 6.🧩 Tara is 8 years old. Aarav is 5 years older than Tara. How old is Aarav? (a) not enough info (b) 13 (c) 14 (d) 5
7. 7.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) all dogs are mean (c) dogs hate you (d) never see dogs
8. 8.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
9. 9.🧩 A box has 4 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 25 (b) 9 (c) not enough info (d) 20
10. 10.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
11. 11.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 60 (b) 6 (c) 12 (d) not enough info
12. 12.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
13. 13.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 6 PM (b) not enough info (c) 9 PM (d) 8 PM
14. 14.🧩 Tara is 11 years old. Ishaan is 8 years older than Tara. How old is Ishaan? (a) 20 (b) 8 (c) not enough info (d) 19
15. 15.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) 3 PM (d) not enough info
16. 16.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
17. 17.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) 9 PM (d) not enough info
18. 18.🧩 Kabir bought 2 pens and a bag for ₹130 in all. Each pen cost the same. What did one pen cost? (a) ₹130 (b) not enough info (c) ₹65 (d) ₹128
19. 19.🧩 Arjun bought 4 mangoes for ₹220 in all. Each mango cost the same. What did one mango cost? (a) ₹220 (b) ₹60 (c) not enough info (d) ₹55
20. 20.🧩 Ananya is 12 years old. Aarav is older than Ananya. How old is Aarav? (a) 17 (b) 13 (c) not enough info (d) 14
21. 21.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
22. 22.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
23. 23.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
24. 24.🧩 Ananya bought 6 balls for ₹180 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹30 (c) ₹35 (d) ₹180
25. 25.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
26. 26.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 3 PM (b) not enough info (c) 2 PM (d) 4 PM
27. 27.🧩 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
28. 28.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
29. 29.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
30. 30.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to change answers (d) to waste time
31. 31.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
32. 32.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
33. 33.🧩 Saanvi is 10 years old. Vihaan is 8 years older than Saanvi. How old is Vihaan? (a) 18 (b) not enough info (c) 8 (d) 19
34. 34.🧩 Tara bought 3 notebooks for ₹45 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹20 (c) ₹15 (d) ₹45
35. 35.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
36. 36.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) not enough info (b) 9 PM (c) 5 PM (d) 8 PM
37. 37.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
38. 38.🧩 Vihaan is 6 years old. Nisha is 2 years older than Vihaan. How old is Nisha? (a) 9 (b) not enough info (c) 8 (d) 2
39. 39.🧩 Nisha bought 4 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹25 (c) ₹100 (d) ₹30
40. 40.🧩 Diya is 10 years old. Rohan is 8 years older than Diya. How old is Rohan? (a) 19 (b) 18 (c) not enough info (d) 8

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