Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 20 · 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 9 in each row. How many apples are in the box? (a) 18 (b) not enough info (c) 90 (d) 9
2. 2.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) guessing (d) asking one friend
3. 3.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
4. 4.🧩 Ishaan bought 2 notebooks for ₹20 in all. Each notebook cost the same. What did one notebook cost? (a) ₹10 (b) ₹15 (c) not enough info (d) ₹20
5. 5.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 2 PM (c) not enough info (d) 4 PM
6. 6.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 8 PM (b) 9 PM (c) 6 PM (d) not enough info
7. 7.🧩 Arjun bought 6 balls and a lunch box for ₹360 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹354 (c) ₹360 (d) ₹60
8. 8.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 9 PM
9. 9.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
10. 10.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) your handwriting (d) the page number
11. 11.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 4 PM (d) 5 PM
12. 12.🧩 Meera bought 4 kites and a water bottle for ₹260 in all. Each kite cost the same. What did one kite cost? (a) ₹65 (b) ₹256 (c) not enough info (d) ₹260
13. 13.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
14. 14.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
15. 15.🧩 Ishaan bought 6 balls for ₹150 in all. Each ball cost the same. What did one ball cost? (a) ₹25 (b) ₹30 (c) not enough info (d) ₹150
16. 16.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
17. 17.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
18. 18.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
19. 19.🧩 Saanvi bought 6 balls and a water bottle for ₹170 in all. Each ball cost the same. What did one ball cost? (a) ₹164 (b) not enough info (c) ₹28 (d) ₹170
20. 20.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
21. 21.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) no, check more (c) yes, it is certain (d) yes, mangoes match
22. 22.🧩 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
23. 23.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) facts that support it (d) a loud opinion
24. 24.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 50 (b) not enough info (c) 10 (d) 5
25. 25.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
26. 26.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
27. 27.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
28. 28.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
29. 29.🧩 A box has 7 rows of apples, with 5 in each row. How many apples are in the box? (a) 40 (b) 35 (c) 12 (d) not enough info
30. 30.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
31. 31.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
32. 32.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
33. 33.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to waste time (d) to change answers
34. 34.🧩 Tara bought 4 mangoes and a water bottle for ₹250 in all. Each mango cost the same. What did one mango cost? (a) ₹62 (b) ₹250 (c) not enough info (d) ₹246
35. 35.🧩 A box has 3 rows of eggs, with 7 in each row. How many eggs are in the box? (a) 10 (b) 21 (c) not enough info (d) 28
36. 36.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) dogs hate you (d) that one dog barked
37. 37.🧩 Tara bought 2 kites for ₹20 in all. Each kite cost the same. What did one kite cost? (a) ₹20 (b) not enough info (c) ₹10 (d) ₹15
38. 38.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 5 PM (c) 9 PM (d) not enough info
39. 39.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
40. 40.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 4 PM (c) 5 PM (d) not enough info

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