Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 221 · 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 4 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 30 (b) not enough info (c) 10 (d) 24
2. 2.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
3. 3.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
4. 4.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
5. 5.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 6 PM (c) not enough info (d) 10 PM
6. 6.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 2 PM (d) 5 PM
7. 7.🧩 A box has 5 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 24 (b) 9 (c) 20 (d) not enough info
8. 8.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 80 (b) 16 (c) 8 (d) not enough info
9. 9.🧩 Aarav is 10 years old. Rohan is 2 years older than Aarav. How old is Rohan? (a) 12 (b) 2 (c) not enough info (d) 13
10. 10.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 7 PM (c) 8 PM (d) not enough info
11. 11.🧩 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
12. 12.🧩 Vihaan bought 4 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) not enough info (c) ₹20 (d) ₹60
13. 13.🧩 Saanvi bought 5 notebooks for ₹75 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) ₹15 (c) not enough info (d) ₹75
14. 14.🧩 Saanvi bought 6 markers for ₹360 in all. Each marker cost the same. What did one marker cost? (a) ₹360 (b) not enough info (c) ₹60 (d) ₹65
15. 15.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) that one dog barked (d) never see dogs
16. 16.🧩 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
17. 17.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
18. 18.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
19. 19.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
20. 20.🧩 Rohan bought 3 balls for ₹135 in all. Each ball cost the same. What did one ball cost? (a) ₹135 (b) ₹45 (c) not enough info (d) ₹50
21. 21.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) asking the whole class (d) guessing
22. 22.🧩 Ananya bought 2 pens and a water bottle for ₹110 in all. Each pen cost the same. What did one pen cost? (a) ₹55 (b) ₹110 (c) ₹108 (d) not enough info
23. 23.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
24. 24.🥭 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) yes, it is certain (c) no mango is sweet (d) no, check more
25. 25.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
26. 26.🧩 Tara bought 3 mangoes for ₹45 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹45 (c) ₹15 (d) ₹20
27. 27.🧩 Aarav bought 3 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹25 (c) ₹60 (d) ₹20
28. 28.🧩 Aarav bought 4 kites and a cap for ₹140 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹140 (c) ₹35 (d) ₹136
29. 29.🧩 Tara is 7 years old. Rohan is older than Tara. How old is Rohan? (a) 8 (b) 12 (c) 9 (d) not enough info
30. 30.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) not enough info (d) 3 PM
31. 31.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
32. 32.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) 14 (b) 70 (c) 7 (d) not enough info
33. 33.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
34. 34.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
35. 35.🧩 Rohan bought 3 balls for ₹165 in all. Each ball cost the same. What did one ball cost? (a) ₹165 (b) ₹60 (c) ₹55 (d) not enough info
36. 36.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) not enough info (b) 5 (c) 10 (d) 50
37. 37.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
38. 38.🧩 A box of apples has 6 in each row. How many apples are in the box? (a) 6 (b) not enough info (c) 60 (d) 12
39. 39.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
40. 40.🧩 Aarav is 11 years old. Nisha is 7 years older than Aarav. How old is Nisha? (a) not enough info (b) 19 (c) 18 (d) 7

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