Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 270 · 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 of mangoes has 4 in each row. How many mangoes are in the box? (a) 4 (b) 8 (c) 40 (d) not enough info
2. 2.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
3. 3.🧩 Meera bought 5 pens and a water bottle for ₹310 in all. Each pen cost the same. What did one pen cost? (a) ₹305 (b) ₹310 (c) not enough info (d) ₹62
4. 4.🧩 Nisha is 6 years old. Saanvi is 2 years older than Nisha. How old is Saanvi? (a) 8 (b) not enough info (c) 9 (d) 2
5. 5.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 6 PM
6. 6.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
7. 7.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
8. 8.🧩 Ishaan is 10 years old. Saanvi is 9 years older than Ishaan. How old is Saanvi? (a) not enough info (b) 9 (c) 19 (d) 20
9. 9.🧩 Saanvi is 10 years old. Meera is older than Saanvi. How old is Meera? (a) 12 (b) not enough info (c) 15 (d) 11
10. 10.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
11. 11.🧩 Tara bought 2 kites and a bag for ₹70 in all. Each kite cost the same. What did one kite cost? (a) ₹68 (b) not enough info (c) ₹70 (d) ₹35
12. 12.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
13. 13.🧩 Arjun bought 3 balls for ₹30 in all. Each ball cost the same. What did one ball cost? (a) ₹15 (b) not enough info (c) ₹10 (d) ₹30
14. 14.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
15. 15.🧩 Meera is 7 years old. Kabir is older than Meera. How old is Kabir? (a) not enough info (b) 8 (c) 9 (d) 12
16. 16.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 8 PM (c) 9 PM (d) 7 PM
17. 17.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
18. 18.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) 7 (b) 14 (c) 70 (d) not enough info
19. 19.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 5 PM (d) 6 PM
20. 20.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) no mango is sweet (c) yes, it is certain (d) yes, mangoes match
21. 21.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only
22. 22.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 16 (b) 8 (c) not enough info (d) 80
23. 23.🧩 Kabir bought 6 markers and a cap for ₹210 in all. Each marker cost the same. What did one marker cost? (a) ₹35 (b) ₹204 (c) ₹210 (d) not enough info
24. 24.🧩 Diya bought 6 pens and a bag for ₹130 in all. Each pen cost the same. What did one pen cost? (a) ₹124 (b) ₹21 (c) ₹130 (d) not enough info
25. 25.🧩 Nisha bought 3 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) ₹10 (b) ₹30 (c) not enough info (d) ₹15
26. 26.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
27. 27.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
28. 28.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) 6 PM (d) not enough info
29. 29.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
30. 30.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
31. 31.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) dogs hate you (d) all dogs are mean
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.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 12 (b) not enough info (c) 60 (d) 6
34. 34.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
35. 35.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 4 (b) 8 (c) 40 (d) not enough info
36. 36.🧩 A box has 8 rows of oranges, with 7 in each row. How many oranges are in the box? (a) not enough info (b) 63 (c) 56 (d) 15
37. 37.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) a rumour (d) facts that support it
38. 38.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
39. 39.🧩 Nisha bought 5 mangoes and a water bottle for ₹105 in all. Each mango cost the same. What did one mango cost? (a) ₹21 (b) not enough info (c) ₹105 (d) ₹100
40. 40.🧩 A box has 3 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 16 (b) 7 (c) not enough info (d) 12

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