Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 821 · 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 8 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 56 (b) 15 (c) not enough info (d) 63
2. 2.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
3. 3.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
4. 4.🥭 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) yes, mangoes match (c) no, check more (d) no mango is sweet
5. 5.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking the whole class (d) asking your pet
6. 6.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
7. 7.🧩 Tara bought 6 pens and a water bottle for ₹150 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹144 (c) ₹150 (d) ₹25
8. 8.🧩 A box has 6 rows of guavas, with 5 in each row. How many guavas are in the box? (a) 35 (b) 30 (c) not enough info (d) 11
9. 9.🧩 A box has 6 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 13 (b) 42 (c) not enough info (d) 49
10. 10.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
11. 11.🧩 Arjun bought 4 markers for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹35 (b) not enough info (c) ₹120 (d) ₹30
12. 12.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 5 PM
13. 13.🧩 Meera is 7 years old. Saanvi is 2 years older than Meera. How old is Saanvi? (a) 10 (b) 2 (c) not enough info (d) 9
14. 14.🧩 A box of oranges has 9 in each row. How many oranges are in the box? (a) 9 (b) 18 (c) not enough info (d) 90
15. 15.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
16. 16.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) not enough info (c) 2 PM (d) 4 PM
17. 17.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
18. 18.🧩 Diya bought 2 balls and a cap for ₹170 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹170 (c) ₹168 (d) ₹85
19. 19.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
20. 20.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) 7 (b) 70 (c) 14 (d) not enough info
21. 21.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
22. 22.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) never see dogs (d) that one dog barked
23. 23.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
24. 24.🧩 Vihaan bought 4 pens for ₹80 in all. Each pen cost the same. What did one pen cost? (a) ₹25 (b) ₹20 (c) not enough info (d) ₹80
25. 25.🧩 A box has 6 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) 49 (b) not enough info (c) 13 (d) 42
26. 26.🧩 A box has 6 rows of eggs, with 8 in each row. How many eggs are in the box? (a) not enough info (b) 48 (c) 56 (d) 14
27. 27.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 5 (b) 10 (c) not enough info (d) 50
28. 28.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
29. 29.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
30. 30.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 8 (b) not enough info (c) 40 (d) 4
31. 31.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 9 PM (b) not enough info (c) 5 PM (d) 8 PM
32. 32.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 6 PM (c) not enough info (d) 7 PM
33. 33.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 9 PM
34. 34.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
35. 35.🧩 Saanvi is 9 years old. Kabir is 8 years older than Saanvi. How old is Kabir? (a) not enough info (b) 8 (c) 18 (d) 17
36. 36.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) 6 PM (c) not enough info (d) 5 PM
37. 37.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
38. 38.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
39. 39.🧩 A box has 8 rows of oranges, with 9 in each row. How many oranges are in the box? (a) not enough info (b) 81 (c) 17 (d) 72
40. 40.🧩 Tara is 12 years old. Saanvi is older than Tara. How old is Saanvi? (a) not enough info (b) 17 (c) 14 (d) 13

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