Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 165 · 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: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
2. 2.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
3. 3.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) never see dogs (d) all dogs are mean
4. 4.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
5. 5.🧩 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
6. 6.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
7. 7.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
8. 8.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
9. 9.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
10. 10.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 8 (b) not enough info (c) 80 (d) 16
11. 11.📝 What does “evidence” mean? (a) a guess (b) facts that support it (c) a rumour (d) a loud opinion
12. 12.🧩 Nisha is 10 years old. Kabir is older than Nisha. How old is Kabir? (a) not enough info (b) 15 (c) 11 (d) 12
13. 13.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 6 PM (d) 5 PM
14. 14.🧩 Meera bought 6 pens for ₹210 in all. Each pen cost the same. What did one pen cost? (a) ₹210 (b) not enough info (c) ₹40 (d) ₹35
15. 15.🧩 Nisha is 8 years old. Kabir is 7 years older than Nisha. How old is Kabir? (a) 16 (b) 15 (c) 7 (d) not enough info
16. 16.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking your pet (d) asking one friend
17. 17.🧩 Vihaan bought 6 balls and a water bottle for ₹370 in all. Each ball cost the same. What did one ball cost? (a) ₹370 (b) ₹61 (c) ₹364 (d) not enough info
18. 18.🧩 Diya is 11 years old. Arjun is older than Diya. How old is Arjun? (a) 12 (b) 13 (c) not enough info (d) 16
19. 19.🧩 Kabir is 6 years old. Meera is older than Kabir. How old is Meera? (a) 11 (b) 7 (c) not enough info (d) 8
20. 20.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) 9 PM (d) not enough info
21. 21.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
22. 22.🧩 Nisha bought 2 markers and a bag for ₹160 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹160 (c) ₹80 (d) ₹158
23. 23.🥭 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) yes, mangoes match (c) no mango is sweet (d) no, check more
24. 24.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
25. 25.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) not enough info (d) 3 PM
26. 26.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
27. 27.🧩 A box has 5 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 48 (b) not enough info (c) 40 (d) 13
28. 28.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) not enough info (b) 6 PM (c) 3 PM (d) 7 PM
29. 29.🧩 A box of oranges has 9 in each row. How many oranges are in the box? (a) not enough info (b) 18 (c) 9 (d) 90
30. 30.🧩 Kabir is 7 years old. Arjun is 9 years older than Kabir. How old is Arjun? (a) 16 (b) not enough info (c) 17 (d) 9
31. 31.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
32. 32.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) for fun only (d) to waste time
33. 33.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
34. 34.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 6 PM (c) not enough info (d) 2 PM
35. 35.🧩 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
36. 36.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
37. 37.🧩 Vihaan bought 4 pens and a bag for ₹90 in all. Each pen cost the same. What did one pen cost? (a) ₹90 (b) not enough info (c) ₹22 (d) ₹86
38. 38.🧩 A box has 5 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 48 (b) 40 (c) not enough info (d) 13
39. 39.🧩 Kabir is 12 years old. Meera is older than Kabir. How old is Meera? (a) 14 (b) 13 (c) 17 (d) not enough info
40. 40.🧩 Saanvi is 9 years old. Nisha is 8 years older than Saanvi. How old is Nisha? (a) not enough info (b) 18 (c) 17 (d) 8

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