Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 231 · 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.🧩 A box has 7 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) not enough info (b) 16 (c) 72 (d) 63
2. 2.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
3. 3.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) a loud opinion (d) facts that support it
4. 4.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
5. 5.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
6. 6.🧩 Tara bought 5 mangoes for ₹200 in all. Each mango cost the same. What did one mango cost? (a) ₹45 (b) not enough info (c) ₹40 (d) ₹200
7. 7.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 5 (b) 10 (c) not enough info (d) 50
8. 8.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
9. 9.🧩 Aarav bought 6 notebooks for ₹360 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹65 (c) ₹360 (d) ₹60
10. 10.🧩 Aarav is 7 years old. Saanvi is older than Aarav. How old is Saanvi? (a) 8 (b) 12 (c) 9 (d) not enough info
11. 11.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 4 PM (c) 5 PM (d) not enough info
12. 12.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
13. 13.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
14. 14.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
15. 15.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
16. 16.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
17. 17.🧩 Aarav bought 5 notebooks for ₹275 in all. Each notebook cost the same. What did one notebook cost? (a) ₹275 (b) ₹60 (c) not enough info (d) ₹55
18. 18.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
19. 19.🧩 Meera is 6 years old. Nisha is 3 years older than Meera. How old is Nisha? (a) 3 (b) 10 (c) 9 (d) not enough info
20. 20.🧩 Saanvi is 8 years old. Nisha is 3 years older than Saanvi. How old is Nisha? (a) 12 (b) 3 (c) not enough info (d) 11
21. 21.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
22. 22.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking one friend (d) asking your pet
23. 23.🧩 Nisha bought 4 notebooks and a lunch box for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹120 (b) ₹116 (c) ₹30 (d) not enough info
24. 24.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
25. 25.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) dogs hate you (d) never see dogs
26. 26.🧩 Ananya bought 3 balls for ₹135 in all. Each ball cost the same. What did one ball cost? (a) ₹50 (b) ₹45 (c) not enough info (d) ₹135
27. 27.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
28. 28.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
29. 29.🧩 Vihaan bought 6 notebooks for ₹360 in all. Each notebook cost the same. What did one notebook cost? (a) ₹65 (b) not enough info (c) ₹60 (d) ₹360
30. 30.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 4 PM (c) 2 PM (d) 3 PM
31. 31.🧩 Aarav bought 5 markers for ₹225 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹50 (c) ₹225 (d) ₹45
32. 32.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 5 (b) not enough info (c) 50 (d) 10
33. 33.🧩 Ananya bought 4 balls for ₹240 in all. Each ball cost the same. What did one ball cost? (a) ₹60 (b) ₹240 (c) ₹65 (d) not enough info
34. 34.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
35. 35.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
36. 36.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
37. 37.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 10 (b) 5 (c) not enough info (d) 50
38. 38.🧩 Aarav bought 6 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹120 (b) ₹25 (c) not enough info (d) ₹20
39. 39.🧩 Rohan is 7 years old. Aarav is 2 years older than Rohan. How old is Aarav? (a) 2 (b) not enough info (c) 10 (d) 9
40. 40.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False

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