Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 286 · 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.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
2. 2.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) not enough info (b) 18 (c) 90 (d) 9
3. 3.🧩 Kabir bought 3 mangoes and a bag for ₹85 in all. Each mango cost the same. What did one mango cost? (a) ₹85 (b) ₹82 (c) not enough info (d) ₹28
4. 4.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
5. 5.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 6 PM (c) not enough info (d) 4 PM
6. 6.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 8 PM (c) not enough info (d) 7 PM
7. 7.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) guessing (d) asking the whole class
8. 8.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 3 PM (b) 5 PM (c) 6 PM (d) not enough info
9. 9.🧩 Arjun is 6 years old. Ananya is 2 years older than Arjun. How old is Ananya? (a) 2 (b) 8 (c) 9 (d) not enough info
10. 10.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) what facts are given (d) the page number
11. 11.🧩 Saanvi bought 6 pens and a water bottle for ₹350 in all. Each pen cost the same. What did one pen cost? (a) ₹350 (b) ₹58 (c) not enough info (d) ₹344
12. 12.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 7 PM (c) not enough info (d) 6 PM
13. 13.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
14. 14.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) dogs hate you (d) never see dogs
15. 15.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
16. 16.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) not enough info (b) 70 (c) 7 (d) 14
17. 17.🧩 Kabir bought 3 balls for ₹30 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹15 (c) ₹10 (d) ₹30
18. 18.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
19. 19.🧩 Rohan bought 5 markers and a lunch box for ₹90 in all. Each marker cost the same. What did one marker cost? (a) ₹85 (b) ₹90 (c) not enough info (d) ₹18
20. 20.🥭 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, check more (c) no mango is sweet (d) yes, it is certain
21. 21.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
22. 22.🧩 Ananya bought 3 notebooks for ₹165 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹60 (c) ₹55 (d) ₹165
23. 23.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a loud opinion (d) a rumour
24. 24.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
25. 25.🧩 Kabir bought 3 pens for ₹75 in all. Each pen cost the same. What did one pen cost? (a) ₹75 (b) not enough info (c) ₹30 (d) ₹25
26. 26.🧩 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
27. 27.🧩 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
28. 28.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 8 (b) 4 (c) not enough info (d) 40
29. 29.🧩 Kabir bought 6 mangoes and a bag for ₹210 in all. Each mango cost the same. What did one mango cost? (a) ₹35 (b) ₹204 (c) not enough info (d) ₹210
30. 30.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
31. 31.🧩 A box has 4 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 20 (b) not enough info (c) 8 (d) 16
32. 32.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) not enough info (c) 4 PM (d) 5 PM
33. 33.🧩 A box has 8 rows of apples, with 7 in each row. How many apples are in the box? (a) 56 (b) 63 (c) not enough info (d) 15
34. 34.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
35. 35.🧩 Rohan bought 6 notebooks for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) ₹240 (b) ₹45 (c) ₹40 (d) not enough info
36. 36.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
37. 37.🧩 Saanvi is 7 years old. Meera is older than Saanvi. How old is Meera? (a) not enough info (b) 9 (c) 8 (d) 12
38. 38.🧩 Meera bought 6 pens for ₹360 in all. Each pen cost the same. What did one pen cost? (a) ₹360 (b) not enough info (c) ₹60 (d) ₹65
39. 39.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
40. 40.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False

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