Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 4 · 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? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
2. 2.🧩 Saanvi is 12 years old. Ishaan is 9 years older than Saanvi. How old is Ishaan? (a) not enough info (b) 22 (c) 9 (d) 21
3. 3.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) no mango is sweet (c) yes, mangoes match (d) yes, it is certain
4. 4.🧩 Kabir bought 5 notebooks for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) ₹35 (b) not enough info (c) ₹150 (d) ₹30
5. 5.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
6. 6.🧩 A box has 8 rows of guavas, with 6 in each row. How many guavas are in the box? (a) not enough info (b) 48 (c) 14 (d) 54
7. 7.🧩 A box has 7 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 40 (b) not enough info (c) 35 (d) 12
8. 8.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 90 (b) 18 (c) 9 (d) not enough info
9. 9.🧩 Tara bought 3 balls and a bag for ₹215 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹212 (c) ₹215 (d) ₹71
10. 10.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
11. 11.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
12. 12.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
13. 13.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
14. 14.🧩 Aarav bought 3 markers and a water bottle for ₹230 in all. Each marker cost the same. What did one marker cost? (a) ₹76 (b) ₹227 (c) ₹230 (d) not enough info
15. 15.🧩 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
16. 16.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) 6 PM (c) not enough info (d) 5 PM
17. 17.🧩 A box has 7 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 40 (b) 12 (c) not enough info (d) 35
18. 18.🧩 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
19. 19.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
20. 20.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 9 (b) 90 (c) 18 (d) not enough info
21. 21.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) 7 (b) 70 (c) 14 (d) not enough info
22. 22.🧩 Vihaan is 6 years old. Tara is older than Vihaan. How old is Tara? (a) 7 (b) not enough info (c) 8 (d) 11
23. 23.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 6 PM (d) 5 PM
24. 24.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
25. 25.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 70 (b) 14 (c) 7 (d) not enough info
26. 26.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
27. 27.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
28. 28.🧩 Vihaan bought 4 notebooks and a water bottle for ₹290 in all. Each notebook cost the same. What did one notebook cost? (a) ₹72 (b) not enough info (c) ₹290 (d) ₹286
29. 29.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 5 PM (c) 8 PM (d) 7 PM
30. 30.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 4 PM (c) 6 PM (d) not enough info
31. 31.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
32. 32.🧩 Saanvi bought 2 markers and a bag for ₹50 in all. Each marker cost the same. What did one marker cost? (a) ₹48 (b) not enough info (c) ₹50 (d) ₹25
33. 33.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
34. 34.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) 60 (b) not enough info (c) 6 (d) 12
35. 35.🧩 Aarav bought 2 notebooks and a lunch box for ₹210 in all. Each notebook cost the same. What did one notebook cost? (a) ₹210 (b) not enough info (c) ₹105 (d) ₹208
36. 36.🧩 Ananya is 10 years old. Ishaan is 2 years older than Ananya. How old is Ishaan? (a) 2 (b) 13 (c) not enough info (d) 12
37. 37.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) not enough info (c) 5 PM (d) 4 PM
38. 38.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
39. 39.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) a rumour (d) facts that support it
40. 40.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 5 PM (d) 3 PM

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