Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 971 · 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 5 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) not enough info (b) 24 (c) 9 (d) 20
2. 2.🧩 Tara bought 2 markers for ₹20 in all. Each marker cost the same. What did one marker cost? (a) ₹15 (b) ₹10 (c) ₹20 (d) not enough info
3. 3.🧩 Meera bought 5 kites and a water bottle for ₹295 in all. Each kite cost the same. What did one kite cost? (a) ₹295 (b) ₹290 (c) ₹59 (d) not enough info
4. 4.🧩 Rohan is 9 years old. Vihaan is older than Rohan. How old is Vihaan? (a) 10 (b) 11 (c) 14 (d) not enough info
5. 5.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) all dogs are mean (d) that one dog barked
6. 6.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
7. 7.🥭 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, check more (c) no mango is sweet (d) yes, mangoes match
8. 8.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
9. 9.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
10. 10.🧩 Aarav bought 2 balls and a water bottle for ₹130 in all. Each ball cost the same. What did one ball cost? (a) ₹130 (b) ₹128 (c) ₹65 (d) not enough info
11. 11.🧩 Aarav bought 4 kites and a lunch box for ₹300 in all. Each kite cost the same. What did one kite cost? (a) ₹296 (b) ₹300 (c) ₹75 (d) not enough info
12. 12.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
13. 13.🧩 Aarav bought 4 markers for ₹240 in all. Each marker cost the same. What did one marker cost? (a) ₹240 (b) ₹65 (c) not enough info (d) ₹60
14. 14.🧩 Aarav is 10 years old. Tara is 3 years older than Aarav. How old is Tara? (a) 14 (b) 13 (c) 3 (d) not enough info
15. 15.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
16. 16.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
17. 17.🧩 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
18. 18.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) 4 PM (c) 3 PM (d) not enough info
19. 19.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
20. 20.🧩 Tara is 7 years old. Diya is older than Tara. How old is Diya? (a) not enough info (b) 9 (c) 8 (d) 12
21. 21.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
22. 22.🧩 Saanvi is 6 years old. Tara is older than Saanvi. How old is Tara? (a) 7 (b) 8 (c) not enough info (d) 11
23. 23.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
24. 24.🧩 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
25. 25.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) not enough info (b) 8 PM (c) 9 PM (d) 6 PM
26. 26.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
27. 27.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 16 (b) not enough info (c) 8 (d) 80
28. 28.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
29. 29.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
30. 30.🧩 A box has 4 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) not enough info (b) 12 (c) 40 (d) 32
31. 31.🧩 Kabir bought 2 notebooks and a lunch box for ₹130 in all. Each notebook cost the same. What did one notebook cost? (a) ₹130 (b) ₹65 (c) ₹128 (d) not enough info
32. 32.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
33. 33.🧩 Tara bought 2 notebooks and a cap for ₹170 in all. Each notebook cost the same. What did one notebook cost? (a) ₹170 (b) ₹85 (c) not enough info (d) ₹168
34. 34.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
35. 35.🧩 Saanvi bought 5 markers and a bag for ₹135 in all. Each marker cost the same. What did one marker cost? (a) ₹135 (b) ₹130 (c) ₹27 (d) not enough info
36. 36.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
37. 37.🧩 Vihaan is 12 years old. Nisha is older than Vihaan. How old is Nisha? (a) 17 (b) not enough info (c) 13 (d) 14
38. 38.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 8 PM
39. 39.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) not enough info (b) 70 (c) 14 (d) 7
40. 40.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) facts that support it (d) a guess

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