Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 338 · 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? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
2. 2.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
3. 3.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
4. 4.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
5. 5.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
6. 6.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
7. 7.🧩 Meera bought 3 balls and a cap for ₹180 in all. Each ball cost the same. What did one ball cost? (a) ₹177 (b) ₹60 (c) not enough info (d) ₹180
8. 8.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to waste time (c) to be sure of results (d) for fun only
9. 9.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
10. 10.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) asking the whole class (d) guessing
11. 11.🥭 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
12. 12.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
13. 13.🧩 Tara bought 2 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) ₹30 (b) not enough info (c) ₹35 (d) ₹60
14. 14.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
15. 15.🧩 Ishaan bought 5 notebooks for ₹200 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹45 (c) ₹40 (d) ₹200
16. 16.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) a loud opinion (d) facts that support it
17. 17.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) that one dog barked (d) dogs hate you
18. 18.🧩 Kabir bought 5 kites and a lunch box for ₹210 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹42 (c) ₹210 (d) ₹205
19. 19.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
20. 20.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 5 (b) 10 (c) 50 (d) not enough info
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) False (b) True
22. 22.🧩 Kabir bought 3 markers for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹180 (b) ₹60 (c) not enough info (d) ₹65
23. 23.🧩 Tara is 10 years old. Diya is older than Tara. How old is Diya? (a) 11 (b) not enough info (c) 15 (d) 12
24. 24.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 3 PM (b) 6 PM (c) not enough info (d) 5 PM
25. 25.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
26. 26.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
27. 27.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
28. 28.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
29. 29.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 8 PM (b) 9 PM (c) 6 PM (d) not enough info
30. 30.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
31. 31.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 7 PM (b) not enough info (c) 4 PM (d) 8 PM
32. 32.🧩 Rohan bought 4 pens for ₹40 in all. Each pen cost the same. What did one pen cost? (a) ₹10 (b) ₹15 (c) not enough info (d) ₹40
33. 33.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
34. 34.🧩 A box has 5 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 9 (b) 20 (c) not enough info (d) 24
35. 35.🧩 Nisha is 11 years old. Vihaan is 6 years older than Nisha. How old is Vihaan? (a) not enough info (b) 18 (c) 17 (d) 6
36. 36.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 3 PM (d) 5 PM
37. 37.🧩 Ishaan bought 2 mangoes and a cap for ₹110 in all. Each mango cost the same. What did one mango cost? (a) ₹108 (b) not enough info (c) ₹110 (d) ₹55
38. 38.🧩 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
39. 39.🧩 A box has 6 rows of apples, with 8 in each row. How many apples are in the box? (a) not enough info (b) 48 (c) 56 (d) 14
40. 40.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 9 (b) 18 (c) not enough info (d) 90

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