Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 628 · 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.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
2. 2.🧩 Nisha is 10 years old. Aarav is 3 years older than Nisha. How old is Aarav? (a) not enough info (b) 13 (c) 3 (d) 14
3. 3.🧩 Meera is 7 years old. Kabir is 4 years older than Meera. How old is Kabir? (a) not enough info (b) 11 (c) 4 (d) 12
4. 4.🐕 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
5. 5.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
6. 6.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 9 PM (b) 6 PM (c) not enough info (d) 8 PM
7. 7.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
8. 8.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
9. 9.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
10. 10.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 8 PM
11. 11.🧩 Kabir is 6 years old. Rohan is older than Kabir. How old is Rohan? (a) 8 (b) 11 (c) not enough info (d) 7
12. 12.📝 What does “evidence” mean? (a) a loud opinion (b) facts that support it (c) a guess (d) a rumour
13. 13.🥭 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) yes, it is certain (c) yes, mangoes match (d) no mango is sweet
14. 14.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
15. 15.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking the whole class (d) asking your pet
16. 16.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
17. 17.🧩 Kabir is 11 years old. Tara is older than Kabir. How old is Tara? (a) 12 (b) not enough info (c) 16 (d) 13
18. 18.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) 70 (b) 7 (c) 14 (d) not enough info
19. 19.🧩 Aarav is 8 years old. Nisha is older than Aarav. How old is Nisha? (a) 13 (b) not enough info (c) 9 (d) 10
20. 20.🧩 A box has 8 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 32 (b) 36 (c) 12 (d) not enough info
21. 21.🧩 Tara is 10 years old. Saanvi is 5 years older than Tara. How old is Saanvi? (a) 16 (b) not enough info (c) 15 (d) 5
22. 22.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 6 PM (c) 4 PM (d) not enough info
23. 23.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
24. 24.🧩 Saanvi is 9 years old. Ishaan is 6 years older than Saanvi. How old is Ishaan? (a) 15 (b) not enough info (c) 16 (d) 6
25. 25.🧩 Diya bought 6 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) ₹90 (c) not enough info (d) ₹15
26. 26.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 8 PM (c) 7 PM (d) not enough info
27. 27.🧩 A box has 3 rows of apples, with 8 in each row. How many apples are in the box? (a) 11 (b) 32 (c) not enough info (d) 24
28. 28.🧩 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
29. 29.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
30. 30.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to be sure of results (d) to change answers
31. 31.🧩 Arjun bought 2 balls for ₹40 in all. Each ball cost the same. What did one ball cost? (a) ₹25 (b) not enough info (c) ₹40 (d) ₹20
32. 32.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
33. 33.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
34. 34.🧩 Nisha is 9 years old. Aarav is older than Nisha. How old is Aarav? (a) 11 (b) not enough info (c) 10 (d) 14
35. 35.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) not enough info (d) 3 PM
36. 36.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
37. 37.🧩 A box has 7 rows of apples, with 4 in each row. How many apples are in the box? (a) 32 (b) 11 (c) 28 (d) not enough info
38. 38.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 8 (b) 16 (c) 80 (d) not enough info
39. 39.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) not enough info (b) 8 PM (c) 4 PM (d) 7 PM
40. 40.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True

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