Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 760 · 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: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
2. 2.🧩 Ananya bought 6 notebooks and a lunch box for ₹380 in all. Each notebook cost the same. What did one notebook cost? (a) ₹63 (b) ₹380 (c) ₹374 (d) not enough info
3. 3.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) 14 (b) 70 (c) not enough info (d) 7
4. 4.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
5. 5.🧩 Nisha is 8 years old. Diya is 4 years older than Nisha. How old is Diya? (a) 4 (b) not enough info (c) 12 (d) 13
6. 6.🧩 Tara bought 6 markers for ₹360 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) not enough info (c) ₹360 (d) ₹65
7. 7.🧩 Nisha bought 3 kites and a bag for ₹70 in all. Each kite cost the same. What did one kite cost? (a) ₹67 (b) ₹70 (c) ₹23 (d) not enough info
8. 8.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 4 PM (b) not enough info (c) 2 PM (d) 5 PM
9. 9.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 7 PM
10. 10.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
11. 11.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
12. 12.🧩 Diya is 6 years old. Arjun is older than Diya. How old is Arjun? (a) 11 (b) not enough info (c) 7 (d) 8
13. 13.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
14. 14.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
15. 15.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
16. 16.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) 6 PM (d) not enough info
17. 17.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) not enough info (b) 8 (c) 16 (d) 80
18. 18.🧩 Rohan is 12 years old. Tara is 5 years older than Rohan. How old is Tara? (a) 5 (b) 17 (c) not enough info (d) 18
19. 19.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking the whole class (d) asking one friend
20. 20.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) not enough info (d) 9 PM
21. 21.🧩 Ananya bought 2 balls for ₹90 in all. Each ball cost the same. What did one ball cost? (a) ₹50 (b) ₹90 (c) not enough info (d) ₹45
22. 22.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
23. 23.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
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.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
26. 26.🧩 Tara is 9 years old. Vihaan is older than Tara. How old is Vihaan? (a) 10 (b) 11 (c) 14 (d) not enough info
27. 27.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 60 (b) not enough info (c) 12 (d) 6
28. 28.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 4 PM (c) 5 PM (d) not enough info
29. 29.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
30. 30.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) not enough info (b) 90 (c) 18 (d) 9
31. 31.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
32. 32.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) never see dogs (d) dogs hate you
33. 33.🧩 A box has 3 rows of apples, with 5 in each row. How many apples are in the box? (a) 20 (b) not enough info (c) 15 (d) 8
34. 34.🧩 Rohan bought 4 markers for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) ₹20 (c) not enough info (d) ₹15
35. 35.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, mangoes match (c) yes, it is certain (d) no, check more
36. 36.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
37. 37.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 2 PM (d) 3 PM
38. 38.🧩 Vihaan bought 3 balls for ₹30 in all. Each ball cost the same. What did one ball cost? (a) ₹15 (b) ₹30 (c) ₹10 (d) not enough info
39. 39.🧩 Tara is 7 years old. Ananya is 4 years older than Tara. How old is Ananya? (a) 11 (b) 12 (c) 4 (d) not enough info
40. 40.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True

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