Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 992 · 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 7 in each row. How many mangoes are in the box? (a) 42 (b) 12 (c) not enough info (d) 35
2. 2.🧩 Kabir bought 2 markers for ₹80 in all. Each marker cost the same. What did one marker cost? (a) ₹40 (b) ₹80 (c) ₹45 (d) not enough info
3. 3.🧩 Diya bought 3 kites for ₹165 in all. Each kite cost the same. What did one kite cost? (a) ₹55 (b) ₹165 (c) ₹60 (d) not enough info
4. 4.🧩 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
5. 5.🧩 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
6. 6.🧩 Meera bought 3 pens for ₹30 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹30 (c) ₹15 (d) ₹10
7. 7.🧩 Arjun bought 2 markers and a water bottle for ₹80 in all. Each marker cost the same. What did one marker cost? (a) ₹40 (b) ₹80 (c) ₹78 (d) not enough info
8. 8.🧩 Diya is 12 years old. Aarav is 7 years older than Diya. How old is Aarav? (a) 20 (b) 19 (c) not enough info (d) 7
9. 9.🧩 Diya bought 3 pens and a lunch box for ₹100 in all. Each pen cost the same. What did one pen cost? (a) ₹33 (b) ₹97 (c) not enough info (d) ₹100
10. 10.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
11. 11.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) not enough info (c) 5 PM (d) 4 PM
12. 12.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
13. 13.🧩 Arjun bought 2 pens for ₹50 in all. Each pen cost the same. What did one pen cost? (a) ₹25 (b) not enough info (c) ₹50 (d) ₹30
14. 14.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) guessing (d) asking your pet
15. 15.🧩 Aarav is 11 years old. Nisha is 6 years older than Aarav. How old is Nisha? (a) 6 (b) not enough info (c) 17 (d) 18
16. 16.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
17. 17.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a rumour (d) a loud opinion
18. 18.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
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) True (b) False
20. 20.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
21. 21.🧩 Saanvi bought 6 pens for ₹330 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹60 (c) ₹55 (d) ₹330
22. 22.🥭 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
23. 23.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 12 (b) 60 (c) 6 (d) not enough info
24. 24.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) to change answers (d) for fun only
25. 25.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) never see dogs (d) that one dog barked
26. 26.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
27. 27.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
28. 28.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
29. 29.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
30. 30.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 3 PM (b) 6 PM (c) 5 PM (d) not enough info
31. 31.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 6 PM (d) 5 PM
32. 32.🧩 A box has 4 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 11 (b) 35 (c) 28 (d) not enough info
33. 33.🧩 A box has 5 rows of oranges, with 6 in each row. How many oranges are in the box? (a) not enough info (b) 11 (c) 30 (d) 36
34. 34.🧩 Aarav bought 5 notebooks for ₹275 in all. Each notebook cost the same. What did one notebook cost? (a) ₹275 (b) ₹60 (c) ₹55 (d) not enough info
35. 35.🧩 Arjun bought 2 balls for ₹40 in all. Each ball cost the same. What did one ball cost? (a) ₹40 (b) not enough info (c) ₹20 (d) ₹25
36. 36.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
37. 37.🧩 A box has 6 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 30 (b) not enough info (c) 11 (d) 35
38. 38.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
39. 39.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
40. 40.🧩 Saanvi is 7 years old. Arjun is 4 years older than Saanvi. How old is Arjun? (a) 12 (b) not enough info (c) 11 (d) 4

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