Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 804 · 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.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) that one dog barked (d) dogs hate you
2. 2.🧩 A box has 5 rows of guavas, with 4 in each row. How many guavas are in the box? (a) not enough info (b) 9 (c) 24 (d) 20
3. 3.🧩 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
4. 4.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
5. 5.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 10 (b) 50 (c) 5 (d) not enough info
6. 6.🧩 Kabir bought 4 notebooks for ₹40 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹10 (c) ₹40 (d) ₹15
7. 7.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) for fun only (d) to waste time
8. 8.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
9. 9.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
10. 10.🧩 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
11. 11.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 6 (b) not enough info (c) 12 (d) 60
12. 12.🧩 Kabir bought 4 markers and a cap for ₹280 in all. Each marker cost the same. What did one marker cost? (a) ₹280 (b) ₹70 (c) not enough info (d) ₹276
13. 13.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
14. 14.🥭 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, it is certain (c) no, check more (d) yes, mangoes match
15. 15.🧩 Ananya is 12 years old. Tara is 7 years older than Ananya. How old is Tara? (a) 7 (b) not enough info (c) 19 (d) 20
16. 16.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
17. 17.🧩 Diya is 8 years old. Tara is 9 years older than Diya. How old is Tara? (a) not enough info (b) 18 (c) 17 (d) 9
18. 18.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
19. 19.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) facts that support it (d) a rumour
20. 20.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 5 PM
21. 21.🧩 Kabir is 10 years old. Tara is 6 years older than Kabir. How old is Tara? (a) 6 (b) not enough info (c) 16 (d) 17
22. 22.🧩 Meera is 8 years old. Ananya is older than Meera. How old is Ananya? (a) 13 (b) not enough info (c) 10 (d) 9
23. 23.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
24. 24.🧩 Saanvi is 6 years old. Aarav is 3 years older than Saanvi. How old is Aarav? (a) 9 (b) 3 (c) not enough info (d) 10
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.🧩 Meera bought 2 notebooks for ₹20 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) not enough info (c) ₹15 (d) ₹10
27. 27.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) 14 (b) 7 (c) not enough info (d) 70
28. 28.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
29. 29.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 9 PM (b) not enough info (c) 8 PM (d) 5 PM
30. 30.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
31. 31.🧩 Rohan is 6 years old. Aarav is older than Rohan. How old is Aarav? (a) not enough info (b) 11 (c) 7 (d) 8
32. 32.🧩 Diya bought 5 markers for ₹300 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) not enough info (c) ₹65 (d) ₹300
33. 33.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) guessing (d) asking your pet
34. 34.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
35. 35.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
36. 36.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
37. 37.🧩 Diya bought 5 mangoes for ₹75 in all. Each mango cost the same. What did one mango cost? (a) ₹75 (b) ₹20 (c) ₹15 (d) not enough info
38. 38.🧩 A box has 6 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 49 (b) not enough info (c) 13 (d) 42
39. 39.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
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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