Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 796 · 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.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
2. 2.🧩 Ishaan is 6 years old. Ananya is 5 years older than Ishaan. How old is Ananya? (a) 12 (b) 5 (c) 11 (d) not enough info
3. 3.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
4. 4.🧩 Nisha is 7 years old. Arjun is 8 years older than Nisha. How old is Arjun? (a) 15 (b) 8 (c) not enough info (d) 16
5. 5.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) not enough info (b) 8 PM (c) 9 PM (d) 6 PM
6. 6.🧩 A box has 6 rows of guavas, with 6 in each row. How many guavas are in the box? (a) 12 (b) 36 (c) not enough info (d) 42
7. 7.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
8. 8.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) not enough info (b) 5 (c) 10 (d) 50
9. 9.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
10. 10.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
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) yes, mangoes match (c) no mango is sweet (d) no, check more
12. 12.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 8 PM
13. 13.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) facts that support it (d) a rumour
14. 14.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 8 (b) 40 (c) 4 (d) not enough info
15. 15.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
16. 16.🧩 A box has 3 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 11 (b) 32 (c) not enough info (d) 24
17. 17.🧩 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
18. 18.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 10 (b) 5 (c) not enough info (d) 50
19. 19.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
20. 20.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
21. 21.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
22. 22.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 6 PM
23. 23.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
24. 24.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
25. 25.🧩 Tara is 6 years old. Arjun is older than Tara. How old is Arjun? (a) 11 (b) not enough info (c) 7 (d) 8
26. 26.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
27. 27.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 60 (b) not enough info (c) 6 (d) 12
28. 28.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
29. 29.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) that one dog barked (d) never see dogs
30. 30.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
31. 31.🧩 Rohan bought 3 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) ₹45 (c) not enough info (d) ₹120
32. 32.🧩 Kabir is 9 years old. Arjun is older than Kabir. How old is Arjun? (a) 10 (b) 11 (c) 14 (d) not enough info
33. 33.🧩 Tara is 11 years old. Meera is 8 years older than Tara. How old is Meera? (a) 8 (b) 19 (c) not enough info (d) 20
34. 34.🧩 Rohan bought 6 markers and a water bottle for ₹140 in all. Each marker cost the same. What did one marker cost? (a) ₹134 (b) ₹23 (c) not enough info (d) ₹140
35. 35.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
36. 36.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) not enough info (b) 8 (c) 16 (d) 80
37. 37.🧩 Arjun is 8 years old. Ishaan is 9 years older than Arjun. How old is Ishaan? (a) not enough info (b) 18 (c) 17 (d) 9
38. 38.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
39. 39.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
40. 40.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 2 PM (c) not enough info (d) 5 PM

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