Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 233 · 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.🧩 A box has 7 rows of eggs, with 8 in each row. How many eggs are in the box? (a) 56 (b) 15 (c) not enough info (d) 64
3. 3.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
4. 4.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
5. 5.🧩 Ananya is 6 years old. Aarav is 4 years older than Ananya. How old is Aarav? (a) 4 (b) 11 (c) not enough info (d) 10
6. 6.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 3 PM (c) not enough info (d) 4 PM
7. 7.🧩 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
8. 8.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
9. 9.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
10. 10.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
11. 11.🧩 Nisha is 9 years old. Arjun is 2 years older than Nisha. How old is Arjun? (a) 2 (b) not enough info (c) 12 (d) 11
12. 12.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 6 PM (b) not enough info (c) 3 PM (d) 5 PM
13. 13.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 3 PM (c) 2 PM (d) not enough info
14. 14.🧩 Tara bought 3 markers for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹65 (b) not enough info (c) ₹180 (d) ₹60
15. 15.🧩 A box has 7 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 72 (b) 63 (c) not enough info (d) 16
16. 16.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking one friend (d) asking the whole class
17. 17.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
18. 18.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) not enough info (b) 14 (c) 70 (d) 7
19. 19.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
20. 20.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) dogs hate you (d) that one dog barked
21. 21.🧩 A box has 3 rows of apples, with 4 in each row. How many apples are in the box? (a) 16 (b) 12 (c) 7 (d) not enough info
22. 22.🧩 Vihaan bought 5 balls and a bag for ₹245 in all. Each ball cost the same. What did one ball cost? (a) ₹49 (b) ₹245 (c) not enough info (d) ₹240
23. 23.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, mangoes match (c) yes, it is certain (d) no, check more
24. 24.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
25. 25.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
26. 26.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a rumour (d) a loud opinion
27. 27.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
28. 28.🧩 Ananya bought 6 notebooks and a lunch box for ₹290 in all. Each notebook cost the same. What did one notebook cost? (a) ₹48 (b) ₹290 (c) not enough info (d) ₹284
29. 29.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
30. 30.🧩 Aarav bought 5 notebooks for ₹250 in all. Each notebook cost the same. What did one notebook cost? (a) ₹55 (b) ₹250 (c) ₹50 (d) not enough info
31. 31.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
32. 32.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
33. 33.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
34. 34.🧩 A box of guavas has 9 in each row. How many guavas are in the box? (a) not enough info (b) 9 (c) 90 (d) 18
35. 35.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
36. 36.🧩 Meera is 12 years old. Aarav is 8 years older than Meera. How old is Aarav? (a) not enough info (b) 8 (c) 21 (d) 20
37. 37.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
38. 38.🧩 Diya bought 5 notebooks for ₹175 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) ₹35 (c) ₹175 (d) not enough info
39. 39.🧩 Aarav is 7 years old. Diya is older than Aarav. How old is Diya? (a) 8 (b) 9 (c) 12 (d) not enough info
40. 40.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 8 PM (b) not enough info (c) 9 PM (d) 6 PM

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