Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 999 · 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 guess (b) a rumour (c) a loud opinion (d) facts that support it
2. 2.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
3. 3.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 3 PM (b) 7 PM (c) 6 PM (d) not enough info
4. 4.🧩 Diya is 8 years old. Aarav is older than Diya. How old is Aarav? (a) 10 (b) 9 (c) not enough info (d) 13
5. 5.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
6. 6.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
7. 7.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
8. 8.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
9. 9.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
10. 10.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) all dogs are mean (c) never see dogs (d) dogs hate you
11. 11.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to be sure of results (d) to waste time
12. 12.🧩 A box has 6 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 10 (b) 24 (c) 28 (d) not enough info
13. 13.🧩 Meera bought 5 markers for ₹250 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) ₹250 (c) ₹55 (d) not enough info
14. 14.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 5 PM (d) 6 PM
15. 15.🧩 Arjun is 12 years old. Saanvi is older than Arjun. How old is Saanvi? (a) 14 (b) not enough info (c) 17 (d) 13
16. 16.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) your handwriting (d) the colour of ink
17. 17.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 2 PM (c) 4 PM (d) 3 PM
18. 18.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 5 PM (c) 2 PM (d) not enough info
19. 19.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
20. 20.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
21. 21.🧩 Vihaan bought 5 notebooks for ₹300 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹300 (c) ₹60 (d) ₹65
22. 22.🧩 Arjun is 6 years old. Tara is 9 years older than Arjun. How old is Tara? (a) 16 (b) not enough info (c) 15 (d) 9
23. 23.🧩 A box of apples has 6 in each row. How many apples are in the box? (a) not enough info (b) 6 (c) 12 (d) 60
24. 24.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
25. 25.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
26. 26.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
27. 27.🧩 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
28. 28.🧩 Aarav bought 5 mangoes for ₹125 in all. Each mango cost the same. What did one mango cost? (a) ₹125 (b) ₹30 (c) ₹25 (d) not enough info
29. 29.🥭 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) no, check more (c) yes, mangoes match (d) no mango is sweet
30. 30.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) asking the whole class (d) guessing
31. 31.🧩 Rohan bought 6 balls for ₹180 in all. Each ball cost the same. What did one ball cost? (a) ₹30 (b) not enough info (c) ₹35 (d) ₹180
32. 32.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) 6 PM (d) not enough info
33. 33.🧩 Rohan bought 2 pens and a lunch box for ₹60 in all. Each pen cost the same. What did one pen cost? (a) ₹30 (b) not enough info (c) ₹58 (d) ₹60
34. 34.🧩 Kabir bought 2 pens for ₹40 in all. Each pen cost the same. What did one pen cost? (a) ₹40 (b) ₹20 (c) not enough info (d) ₹25
35. 35.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
36. 36.🧩 Kabir is 7 years old. Diya is older than Kabir. How old is Diya? (a) 12 (b) 8 (c) not enough info (d) 9
37. 37.🧩 Rohan is 12 years old. Vihaan is 2 years older than Rohan. How old is Vihaan? (a) not enough info (b) 2 (c) 15 (d) 14
38. 38.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
39. 39.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
40. 40.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 10 PM (b) 6 PM (c) not enough info (d) 9 PM

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