Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 88 · 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.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
2. 2.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no, check more (c) yes, it is certain (d) no mango is sweet
3. 3.🧩 Kabir is 6 years old. Diya is 9 years older than Kabir. How old is Diya? (a) 15 (b) not enough info (c) 9 (d) 16
4. 4.🧩 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
5. 5.🧩 Kabir bought 3 mangoes for ₹90 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹90 (c) ₹35 (d) ₹30
6. 6.🧩 Ananya bought 4 notebooks for ₹140 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹140 (c) ₹40 (d) ₹35
7. 7.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
8. 8.🧩 Tara bought 3 mangoes for ₹45 in all. Each mango cost the same. What did one mango cost? (a) ₹45 (b) ₹20 (c) not enough info (d) ₹15
9. 9.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
10. 10.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) facts that support it (d) a guess
11. 11.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
12. 12.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 5 PM (c) 2 PM (d) not enough info
13. 13.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
14. 14.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 8 (b) 80 (c) not enough info (d) 16
15. 15.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only
16. 16.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
17. 17.🧩 Meera is 11 years old. Rohan is older than Meera. How old is Rohan? (a) 13 (b) 12 (c) not enough info (d) 16
18. 18.🧩 Ishaan bought 5 mangoes for ₹175 in all. Each mango cost the same. What did one mango cost? (a) ₹40 (b) not enough info (c) ₹175 (d) ₹35
19. 19.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
20. 20.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
21. 21.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) not enough info (c) 4 PM (d) 5 PM
22. 22.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) not enough info (b) 40 (c) 8 (d) 4
23. 23.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
24. 24.🧩 Kabir bought 5 mangoes for ₹175 in all. Each mango cost the same. What did one mango cost? (a) ₹35 (b) ₹40 (c) not enough info (d) ₹175
25. 25.🧩 Arjun bought 5 markers for ₹250 in all. Each marker cost the same. What did one marker cost? (a) ₹55 (b) ₹50 (c) not enough info (d) ₹250
26. 26.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
27. 27.🧩 Ishaan bought 4 balls for ₹100 in all. Each ball cost the same. What did one ball cost? (a) ₹30 (b) ₹100 (c) not enough info (d) ₹25
28. 28.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
29. 29.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
30. 30.🧩 Meera is 8 years old. Aarav is 6 years older than Meera. How old is Aarav? (a) not enough info (b) 6 (c) 15 (d) 14
31. 31.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
32. 32.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
33. 33.🧩 Diya bought 2 markers for ₹100 in all. Each marker cost the same. What did one marker cost? (a) ₹100 (b) ₹55 (c) ₹50 (d) not enough info
34. 34.🐕 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
35. 35.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 18 (b) 90 (c) not enough info (d) 9
36. 36.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 2 PM (b) not enough info (c) 5 PM (d) 4 PM
37. 37.🧩 Vihaan is 11 years old. Ananya is 2 years older than Vihaan. How old is Ananya? (a) 13 (b) 2 (c) not enough info (d) 14
38. 38.🧩 Kabir bought 4 mangoes for ₹200 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹50 (c) ₹200 (d) ₹55
39. 39.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
40. 40.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False

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