Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 352 · 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.🧩 Aarav bought 4 pens for ₹240 in all. Each pen cost the same. What did one pen cost? (a) ₹240 (b) ₹60 (c) ₹65 (d) not enough info
2. 2.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) asking your pet (d) guessing
3. 3.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
4. 4.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
5. 5.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
6. 6.🧩 Meera bought 2 markers for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹120 (b) ₹65 (c) ₹60 (d) not enough info
7. 7.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
8. 8.🧩 Vihaan is 11 years old. Meera is older than Vihaan. How old is Meera? (a) not enough info (b) 13 (c) 16 (d) 12
9. 9.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
10. 10.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
11. 11.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
12. 12.🧩 Rohan is 10 years old. Ananya is older than Rohan. How old is Ananya? (a) not enough info (b) 12 (c) 15 (d) 11
13. 13.🥭 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) no mango is sweet (c) no, check more (d) yes, mangoes match
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: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
16. 16.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
17. 17.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
18. 18.🧩 Ananya is 6 years old. Arjun is older than Ananya. How old is Arjun? (a) 7 (b) 8 (c) 11 (d) not enough info
19. 19.🧩 Aarav bought 2 pens and a lunch box for ₹100 in all. Each pen cost the same. What did one pen cost? (a) ₹98 (b) ₹50 (c) ₹100 (d) not enough info
20. 20.🧩 Saanvi is 6 years old. Ishaan is older than Saanvi. How old is Ishaan? (a) 11 (b) 8 (c) 7 (d) not enough info
21. 21.🧩 Diya is 11 years old. Nisha is older than Diya. How old is Nisha? (a) 12 (b) not enough info (c) 16 (d) 13
22. 22.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) all dogs are mean (d) never see dogs
23. 23.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
24. 24.🧩 Meera bought 2 mangoes and a water bottle for ₹50 in all. Each mango cost the same. What did one mango cost? (a) ₹48 (b) ₹25 (c) not enough info (d) ₹50
25. 25.🧩 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
26. 26.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) facts that support it (d) a rumour
27. 27.🧩 Diya bought 3 balls and a cap for ₹210 in all. Each ball cost the same. What did one ball cost? (a) ₹207 (b) ₹210 (c) not enough info (d) ₹70
28. 28.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
29. 29.🧩 Diya is 9 years old. Saanvi is 7 years older than Diya. How old is Saanvi? (a) 7 (b) 16 (c) not enough info (d) 17
30. 30.🧩 Diya bought 4 balls and a cap for ₹300 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹296 (c) ₹300 (d) ₹75
31. 31.🧩 Vihaan is 8 years old. Ananya is 7 years older than Vihaan. How old is Ananya? (a) 15 (b) not enough info (c) 16 (d) 7
32. 32.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 7 PM (c) 6 PM (d) not enough info
33. 33.🧩 A box has 8 rows of guavas, with 6 in each row. How many guavas are in the box? (a) 14 (b) 54 (c) not enough info (d) 48
34. 34.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) 7 (b) 70 (c) not enough info (d) 14
35. 35.🧩 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
36. 36.🧩 Aarav is 8 years old. Vihaan is older than Aarav. How old is Vihaan? (a) 9 (b) 13 (c) not enough info (d) 10
37. 37.🧩 A box has 5 rows of apples, with 6 in each row. How many apples are in the box? (a) 11 (b) 36 (c) not enough info (d) 30
38. 38.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 4 PM (c) 3 PM (d) 2 PM
39. 39.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) 8 PM (d) not enough info
40. 40.🧩 A box has 4 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) 36 (b) 45 (c) not enough info (d) 13

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