Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 174 · 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.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) a rumour (d) facts that support it
2. 2.🧩 A box has 5 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) not enough info (b) 14 (c) 45 (d) 54
3. 3.🧩 Nisha bought 2 markers for ₹70 in all. Each marker cost the same. What did one marker cost? (a) ₹40 (b) ₹70 (c) not enough info (d) ₹35
4. 4.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
5. 5.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 7 PM (c) 6 PM (d) not enough info
6. 6.🧩 Vihaan bought 3 markers for ₹165 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹60 (c) ₹165 (d) ₹55
7. 7.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
8. 8.🧩 Rohan bought 5 balls and a cap for ₹95 in all. Each ball cost the same. What did one ball cost? (a) ₹90 (b) not enough info (c) ₹95 (d) ₹19
9. 9.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
10. 10.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
11. 11.🧩 Saanvi bought 3 markers for ₹165 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) ₹165 (c) not enough info (d) ₹55
12. 12.🧩 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
13. 13.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
14. 14.🧩 Kabir bought 6 balls for ₹120 in all. Each ball cost the same. What did one ball cost? (a) ₹120 (b) ₹20 (c) ₹25 (d) not enough info
15. 15.🧩 Vihaan bought 5 markers and a bag for ₹165 in all. Each marker cost the same. What did one marker cost? (a) ₹160 (b) not enough info (c) ₹165 (d) ₹33
16. 16.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 8 PM (c) not enough info (d) 7 PM
17. 17.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
18. 18.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
19. 19.🧩 Rohan is 8 years old. Vihaan is 6 years older than Rohan. How old is Vihaan? (a) 14 (b) 6 (c) not enough info (d) 15
20. 20.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
21. 21.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
22. 22.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 3 PM (c) 7 PM (d) not enough info
23. 23.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) all dogs are mean (d) never see dogs
24. 24.🧩 A box has 3 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) not enough info (b) 7 (c) 16 (d) 12
25. 25.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
26. 26.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking your pet (d) asking one friend
27. 27.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
28. 28.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
29. 29.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
30. 30.🥭 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
31. 31.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
32. 32.🧩 A box has 6 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) not enough info (b) 28 (c) 10 (d) 24
33. 33.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) what facts are given (d) your handwriting
34. 34.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) 3 PM (c) not enough info (d) 4 PM
35. 35.🧩 Nisha bought 4 markers for ₹40 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹40 (c) ₹15 (d) ₹10
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.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
38. 38.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
39. 39.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 5 PM (c) not enough info (d) 3 PM
40. 40.🧩 A box has 6 rows of eggs, with 9 in each row. How many eggs are in the box? (a) 63 (b) 54 (c) not enough info (d) 15

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