Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 859 · 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.🥭 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) no mango is sweet (c) yes, it is certain (d) no, check more
2. 2.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
3. 3.🧩 A box of laddoos has 8 in each row. How many laddoos are in the box? (a) 80 (b) not enough info (c) 8 (d) 16
4. 4.🧩 Aarav bought 4 markers and a water bottle for ₹140 in all. Each marker cost the same. What did one marker cost? (a) ₹136 (b) ₹35 (c) ₹140 (d) not enough info
5. 5.🧩 A box has 5 rows of apples, with 8 in each row. How many apples are in the box? (a) 48 (b) 40 (c) not enough info (d) 13
6. 6.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
7. 7.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 4 PM
8. 8.🧩 Meera bought 2 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) ₹35 (b) not enough info (c) ₹30 (d) ₹60
9. 9.🧩 A box has 6 rows of guavas, with 6 in each row. How many guavas are in the box? (a) 36 (b) not enough info (c) 12 (d) 42
10. 10.🧩 Kabir is 9 years old. Ananya is older than Kabir. How old is Ananya? (a) 10 (b) 11 (c) 14 (d) not enough info
11. 11.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 4 PM (c) not enough info (d) 5 PM
12. 12.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
13. 13.🧩 A box has 4 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 10 (b) not enough info (c) 24 (d) 30
14. 14.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
15. 15.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
16. 16.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) not enough info (d) 3 PM
17. 17.📊 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
18. 18.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 8 PM (c) 7 PM (d) not enough info
19. 19.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 6 PM (c) 5 PM (d) not enough info
20. 20.🧩 Ananya bought 4 mangoes for ₹40 in all. Each mango cost the same. What did one mango cost? (a) ₹15 (b) ₹10 (c) not enough info (d) ₹40
21. 21.🧩 Diya bought 3 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) ₹20 (c) not enough info (d) ₹25
22. 22.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
23. 23.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 4 (b) 40 (c) not enough info (d) 8
24. 24.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 7 PM
25. 25.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 4 PM (c) not enough info (d) 2 PM
26. 26.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) not enough info (b) 7 (c) 14 (d) 70
27. 27.🧩 A box has 8 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) not enough info (b) 36 (c) 32 (d) 12
28. 28.🧩 Arjun bought 6 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹90 (b) ₹15 (c) not enough info (d) ₹20
29. 29.🧩 Diya is 12 years old. Saanvi is older than Diya. How old is Saanvi? (a) 14 (b) 13 (c) not enough info (d) 17
30. 30.🧩 Kabir bought 3 markers for ₹105 in all. Each marker cost the same. What did one marker cost? (a) ₹40 (b) not enough info (c) ₹105 (d) ₹35
31. 31.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
32. 32.🧩 A box has 4 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) not enough info (b) 40 (c) 12 (d) 32
33. 33.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) not enough info (b) 9 (c) 18 (d) 90
34. 34.🧩 Aarav is 11 years old. Ananya is older than Aarav. How old is Ananya? (a) 12 (b) 16 (c) not enough info (d) 13
35. 35.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
36. 36.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
37. 37.🧩 A box has 7 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 28 (b) not enough info (c) 11 (d) 32
38. 38.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
39. 39.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
40. 40.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True

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