Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 215 · 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 apples has 5 in each row. How many apples are in the box? (a) 5 (b) not enough info (c) 50 (d) 10
2. 2.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 6 PM (c) not enough info (d) 4 PM
3. 3.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
4. 4.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
5. 5.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
6. 6.🧩 Meera is 7 years old. Vihaan is older than Meera. How old is Vihaan? (a) 9 (b) 12 (c) not enough info (d) 8
7. 7.🧩 Ananya is 12 years old. Saanvi is older than Ananya. How old is Saanvi? (a) 17 (b) 13 (c) not enough info (d) 14
8. 8.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
9. 9.🧩 Vihaan bought 6 pens for ₹270 in all. Each pen cost the same. What did one pen cost? (a) ₹50 (b) ₹45 (c) ₹270 (d) not enough info
10. 10.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
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.🧩 Ananya bought 4 kites for ₹100 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹100 (c) ₹30 (d) ₹25
13. 13.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
14. 14.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
15. 15.🧩 A box has 3 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 15 (b) not enough info (c) 20 (d) 8
16. 16.🧩 A box has 4 rows of guavas, with 4 in each row. How many guavas are in the box? (a) not enough info (b) 16 (c) 20 (d) 8
17. 17.🧩 Ishaan bought 6 balls and a cap for ₹150 in all. Each ball cost the same. What did one ball cost? (a) ₹150 (b) ₹25 (c) ₹144 (d) not enough info
18. 18.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) not enough info (d) 9 PM
19. 19.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
20. 20.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) not enough info (b) 2 PM (c) 6 PM (d) 5 PM
21. 21.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) never see dogs (d) all dogs are mean
22. 22.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
23. 23.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
24. 24.🧩 Diya bought 2 pens and a water bottle for ₹80 in all. Each pen cost the same. What did one pen cost? (a) ₹80 (b) ₹40 (c) not enough info (d) ₹78
25. 25.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) a rumour (d) facts that support it
26. 26.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 18 (b) 90 (c) not enough info (d) 9
27. 27.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
28. 28.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking the whole class (d) asking one friend
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.🧩 Rohan is 8 years old. Vihaan is 8 years older than Rohan. How old is Vihaan? (a) 8 (b) not enough info (c) 17 (d) 16
31. 31.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
32. 32.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 40 (b) not enough info (c) 8 (d) 4
33. 33.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
34. 34.🧩 Arjun bought 6 kites for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹25 (b) not enough info (c) ₹120 (d) ₹20
35. 35.🧩 A box has 6 rows of eggs, with 7 in each row. How many eggs are in the box? (a) 49 (b) 42 (c) 13 (d) not enough info
36. 36.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
37. 37.🧩 Meera bought 3 notebooks and a bag for ₹75 in all. Each notebook cost the same. What did one notebook cost? (a) ₹72 (b) ₹25 (c) not enough info (d) ₹75
38. 38.🥭 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, mangoes match (d) yes, it is certain
39. 39.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
40. 40.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence

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