Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 3 · 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.🐕 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
2. 2.🧩 Vihaan bought 2 mangoes and a bag for ₹110 in all. Each mango cost the same. What did one mango cost? (a) ₹55 (b) ₹108 (c) not enough info (d) ₹110
3. 3.🧩 Ishaan bought 6 pens and a lunch box for ₹360 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹360 (c) ₹354 (d) ₹60
4. 4.🧩 Tara is 7 years old. Kabir is 4 years older than Tara. How old is Kabir? (a) 11 (b) 4 (c) not enough info (d) 12
5. 5.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a loud opinion (d) a guess
6. 6.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
7. 7.🧩 A box has 3 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) not enough info (b) 8 (c) 15 (d) 20
8. 8.🧩 Tara bought 4 mangoes and a cap for ₹160 in all. Each mango cost the same. What did one mango cost? (a) ₹40 (b) ₹156 (c) not enough info (d) ₹160
9. 9.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
10. 10.🧩 Aarav is 6 years old. Diya is 5 years older than Aarav. How old is Diya? (a) not enough info (b) 5 (c) 11 (d) 12
11. 11.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) 3 PM (d) not enough info
12. 12.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
13. 13.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 8 PM (c) not enough info (d) 7 PM
14. 14.🧩 Tara is 7 years old. Arjun is 8 years older than Tara. How old is Arjun? (a) 16 (b) 8 (c) not enough info (d) 15
15. 15.🧩 Nisha bought 4 mangoes for ₹140 in all. Each mango cost the same. What did one mango cost? (a) ₹140 (b) ₹35 (c) not enough info (d) ₹40
16. 16.🧩 Tara bought 5 kites and a cap for ₹130 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹130 (c) ₹26 (d) ₹125
17. 17.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
18. 18.🧩 Rohan bought 3 notebooks for ₹165 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) ₹55 (c) not enough info (d) ₹165
19. 19.🧩 Rohan is 6 years old. Kabir is older than Rohan. How old is Kabir? (a) 7 (b) not enough info (c) 11 (d) 8
20. 20.🧩 Diya is 7 years old. Arjun is 3 years older than Diya. How old is Arjun? (a) 11 (b) 10 (c) not enough info (d) 3
21. 21.🧩 A box has 6 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 14 (b) 56 (c) not enough info (d) 48
22. 22.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
23. 23.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) no mango is sweet (c) yes, it is certain (d) yes, mangoes match
24. 24.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
25. 25.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 4 PM
26. 26.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) asking your pet (d) guessing
27. 27.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
28. 28.🧩 A box has 4 rows of oranges, with 8 in each row. How many oranges are in the box? (a) 40 (b) 32 (c) 12 (d) not enough info
29. 29.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 7 PM (c) not enough info (d) 6 PM
30. 30.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
31. 31.🧩 Meera bought 5 notebooks and a lunch box for ₹115 in all. Each notebook cost the same. What did one notebook cost? (a) ₹110 (b) ₹115 (c) not enough info (d) ₹23
32. 32.🧩 A box has 5 rows of apples, with 9 in each row. How many apples are in the box? (a) 54 (b) not enough info (c) 14 (d) 45
33. 33.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
34. 34.🧩 Rohan is 6 years old. Ishaan is older than Rohan. How old is Ishaan? (a) 7 (b) 11 (c) not enough info (d) 8
35. 35.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 6 PM (c) not enough info (d) 7 PM
36. 36.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
37. 37.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
38. 38.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
39. 39.🧩 Arjun bought 6 markers and a lunch box for ₹210 in all. Each marker cost the same. What did one marker cost? (a) ₹204 (b) not enough info (c) ₹210 (d) ₹35
40. 40.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 8 (b) 4 (c) not enough info (d) 40

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