Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 13 · 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: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
2. 2.🧩 Arjun bought 5 notebooks for ₹125 in all. Each notebook cost the same. What did one notebook cost? (a) ₹25 (b) ₹30 (c) ₹125 (d) not enough info
3. 3.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
4. 4.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
5. 5.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) not enough info (b) 7 (c) 14 (d) 70
6. 6.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a loud opinion (d) a rumour
7. 7.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
8. 8.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
9. 9.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
10. 10.🧩 A box has 3 rows of apples, with 7 in each row. How many apples are in the box? (a) 10 (b) not enough info (c) 21 (d) 28
11. 11.🧩 Arjun is 6 years old. Meera is 2 years older than Arjun. How old is Meera? (a) 2 (b) 8 (c) not enough info (d) 9
12. 12.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
13. 13.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
14. 14.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
15. 15.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) not enough info (b) 16 (c) 80 (d) 8
16. 16.🧩 Meera bought 6 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) not enough info (c) ₹15 (d) ₹10
17. 17.🧩 A box has 8 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 15 (b) 56 (c) 63 (d) not enough info
18. 18.🧩 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
19. 19.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to be sure of results (d) to waste time
20. 20.🧩 Meera bought 2 markers and a water bottle for ₹100 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) ₹100 (c) ₹98 (d) not enough info
21. 21.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 9 PM (c) 7 PM (d) 8 PM
22. 22.🥭 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) yes, it is certain (d) no mango is sweet
23. 23.🧩 Kabir bought 5 balls for ₹50 in all. Each ball cost the same. What did one ball cost? (a) ₹50 (b) not enough info (c) ₹15 (d) ₹10
24. 24.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) guessing (d) asking the whole class
25. 25.🧩 Vihaan is 10 years old. Diya is older than Vihaan. How old is Diya? (a) 11 (b) 15 (c) 12 (d) not enough info
26. 26.🧩 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
27. 27.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 4 PM
28. 28.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
29. 29.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 70 (b) 14 (c) not enough info (d) 7
30. 30.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 3 PM (c) not enough info (d) 5 PM
31. 31.🧩 Arjun bought 3 mangoes and a bag for ₹70 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹67 (c) ₹70 (d) ₹23
32. 32.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 4 PM
33. 33.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
34. 34.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) 6 PM (c) 5 PM (d) not enough info
35. 35.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 2 PM (c) not enough info (d) 4 PM
36. 36.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
37. 37.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
38. 38.🧩 Tara is 10 years old. Ishaan is older than Tara. How old is Ishaan? (a) not enough info (b) 15 (c) 12 (d) 11
39. 39.🧩 Ananya bought 5 notebooks for ₹300 in all. Each notebook cost the same. What did one notebook cost? (a) ₹65 (b) not enough info (c) ₹300 (d) ₹60
40. 40.🧩 Arjun is 6 years old. Tara is 4 years older than Arjun. How old is Tara? (a) 11 (b) 4 (c) 10 (d) not enough info

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