Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 387 · 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.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 8 PM (d) 7 PM
2. 2.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
3. 3.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 5 PM (c) not enough info (d) 8 PM
4. 4.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
5. 5.🧩 Diya is 9 years old. Rohan is 8 years older than Diya. How old is Rohan? (a) 18 (b) 8 (c) not enough info (d) 17
6. 6.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) never see dogs (d) that one dog barked
7. 7.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) your handwriting (d) the page number
8. 8.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking your pet (c) asking one friend (d) guessing
9. 9.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
10. 10.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
11. 11.🧩 Kabir is 11 years old. Tara is 2 years older than Kabir. How old is Tara? (a) 2 (b) not enough info (c) 13 (d) 14
12. 12.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 4 PM (c) 2 PM (d) 5 PM
13. 13.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
14. 14.🧩 Kabir bought 3 notebooks for ₹75 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹30 (c) ₹25 (d) ₹75
15. 15.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
16. 16.🧩 Diya bought 4 balls for ₹160 in all. Each ball cost the same. What did one ball cost? (a) ₹160 (b) ₹45 (c) not enough info (d) ₹40
17. 17.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 9 PM (d) 8 PM
18. 18.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
19. 19.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
20. 20.🧩 Ishaan bought 6 notebooks and a cap for ₹230 in all. Each notebook cost the same. What did one notebook cost? (a) ₹224 (b) ₹230 (c) not enough info (d) ₹38
21. 21.🧩 Vihaan bought 4 mangoes and a water bottle for ₹90 in all. Each mango cost the same. What did one mango cost? (a) ₹22 (b) not enough info (c) ₹90 (d) ₹86
22. 22.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
23. 23.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
24. 24.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
25. 25.🧩 Nisha bought 3 markers for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹180 (b) not enough info (c) ₹65 (d) ₹60
26. 26.🧩 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
27. 27.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
28. 28.🧩 Saanvi 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
29. 29.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
30. 30.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) not enough info (b) 9 (c) 18 (d) 90
31. 31.🧩 Kabir bought 3 notebooks and a cap for ₹250 in all. Each notebook cost the same. What did one notebook cost? (a) ₹247 (b) ₹250 (c) ₹83 (d) not enough info
32. 32.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 5 PM (c) not enough info (d) 6 PM
33. 33.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
34. 34.🧩 Vihaan is 11 years old. Arjun is 2 years older than Vihaan. How old is Arjun? (a) 13 (b) 14 (c) not enough info (d) 2
35. 35.🧩 Arjun is 10 years old. Tara is 4 years older than Arjun. How old is Tara? (a) 14 (b) not enough info (c) 4 (d) 15
36. 36.🧩 A box has 6 rows of apples, with 5 in each row. How many apples are in the box? (a) 35 (b) not enough info (c) 30 (d) 11
37. 37.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
38. 38.🧩 Arjun is 12 years old. Tara is older than Arjun. How old is Tara? (a) not enough info (b) 14 (c) 17 (d) 13
39. 39.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
40. 40.🧩 Rohan bought 2 balls and a cap for ₹120 in all. Each ball cost the same. What did one ball cost? (a) ₹60 (b) ₹120 (c) ₹118 (d) not enough info

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