Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 787 · 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.” gives enough evidence. (a) True (b) False
2. 2.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) not enough info (b) 4 PM (c) 5 PM (d) 6 PM
3. 3.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
4. 4.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
5. 5.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
6. 6.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
7. 7.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) facts that support it (d) a guess
8. 8.🧩 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
9. 9.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 4 PM
10. 10.🧩 Vihaan bought 2 balls and a bag for ₹110 in all. Each ball cost the same. What did one ball cost? (a) ₹108 (b) not enough info (c) ₹55 (d) ₹110
11. 11.🧩 Meera is 11 years old. Vihaan is 4 years older than Meera. How old is Vihaan? (a) 4 (b) 15 (c) 16 (d) not enough info
12. 12.🧩 Ishaan is 8 years old. Ananya is older than Ishaan. How old is Ananya? (a) 9 (b) 10 (c) 13 (d) not enough info
13. 13.🧩 Kabir bought 2 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) ₹120 (c) not enough info (d) ₹65
14. 14.🧩 Tara is 10 years old. Diya is older than Tara. How old is Diya? (a) not enough info (b) 12 (c) 15 (d) 11
15. 15.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
16. 16.🧩 Ananya bought 6 markers for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹35 (b) ₹30 (c) ₹180 (d) not enough info
17. 17.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 8 PM
18. 18.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
19. 19.🧩 Kabir is 10 years old. Meera is 2 years older than Kabir. How old is Meera? (a) 13 (b) 12 (c) 2 (d) not enough info
20. 20.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
21. 21.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to waste time (c) for fun only (d) to be sure of results
22. 22.🧩 Kabir bought 3 markers and a water bottle for ₹160 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹53 (c) ₹157 (d) ₹160
23. 23.🧩 Rohan is 12 years old. Aarav is 5 years older than Rohan. How old is Aarav? (a) not enough info (b) 18 (c) 17 (d) 5
24. 24.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 5 PM
25. 25.🧩 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
26. 26.🥭 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
27. 27.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
28. 28.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 4 PM (c) 5 PM (d) not enough info
29. 29.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
30. 30.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
31. 31.🧩 Meera bought 2 pens for ₹20 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹15 (c) ₹10 (d) ₹20
32. 32.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
33. 33.📊 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
34. 34.🧩 Aarav bought 2 notebooks for ₹70 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) ₹70 (c) not enough info (d) ₹35
35. 35.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
36. 36.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
37. 37.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
38. 38.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 3 PM (c) not enough info (d) 2 PM
39. 39.🧩 Rohan bought 6 mangoes and a water bottle for ₹250 in all. Each mango cost the same. What did one mango cost? (a) ₹244 (b) ₹41 (c) ₹250 (d) not enough info
40. 40.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 9 PM (c) 5 PM (d) not enough info

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