Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 438 · 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 tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
2. 2.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
3. 3.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
4. 4.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
5. 5.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
6. 6.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
7. 7.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
8. 8.🧩 Tara bought 5 markers for ₹125 in all. Each marker cost the same. What did one marker cost? (a) ₹30 (b) ₹25 (c) not enough info (d) ₹125
9. 9.🧩 Kabir bought 2 notebooks for ₹20 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) ₹20 (c) ₹10 (d) not enough info
10. 10.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 5 PM (c) not enough info (d) 4 PM
11. 11.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 6 PM
12. 12.🧩 Aarav bought 6 markers and a cap for ₹170 in all. Each marker cost the same. What did one marker cost? (a) ₹170 (b) not enough info (c) ₹164 (d) ₹28
13. 13.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to be sure of results (d) to waste time
14. 14.🧩 Meera bought 5 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹25 (b) ₹20 (c) not enough info (d) ₹100
15. 15.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
16. 16.🧩 Aarav bought 5 mangoes for ₹300 in all. Each mango cost the same. What did one mango cost? (a) ₹65 (b) not enough info (c) ₹300 (d) ₹60
17. 17.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 8 (b) 4 (c) 40 (d) not enough info
18. 18.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking the whole class (d) asking one friend
19. 19.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
20. 20.🧩 A box has 7 rows of oranges, with 8 in each row. How many oranges are in the box? (a) 56 (b) 15 (c) not enough info (d) 64
21. 21.🧩 Tara bought 3 notebooks for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) ₹65 (b) ₹60 (c) not enough info (d) ₹180
22. 22.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
23. 23.🧩 Ananya bought 2 notebooks and a lunch box for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) ₹78 (c) ₹80 (d) not enough info
24. 24.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 8 (b) not enough info (c) 80 (d) 16
25. 25.🥭 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, check more (c) no mango is sweet (d) yes, it is certain
26. 26.🐕 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
27. 27.🧩 Meera is 6 years old. Aarav is older than Meera. How old is Aarav? (a) 11 (b) 7 (c) 8 (d) not enough info
28. 28.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
29. 29.🧩 Ishaan is 10 years old. Diya is 8 years older than Ishaan. How old is Diya? (a) 18 (b) 8 (c) 19 (d) not enough info
30. 30.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
31. 31.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
32. 32.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 4 PM
33. 33.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) what facts are given (d) the colour of ink
34. 34.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 2 PM (c) 3 PM (d) not enough info
35. 35.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
36. 36.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
37. 37.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
38. 38.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 7 PM (d) 5 PM
39. 39.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 50 (b) 10 (c) 5 (d) not enough info
40. 40.🧩 A box has 3 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) not enough info (b) 8 (c) 15 (d) 20

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