Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 944 · 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.🧩 A box has 5 rows of oranges, with 4 in each row. How many oranges are in the box? (a) not enough info (b) 24 (c) 9 (d) 20
2. 2.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 6 PM (d) 4 PM
3. 3.🧩 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
4. 4.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to waste time (d) to change answers
5. 5.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) never see dogs (d) all dogs are mean
6. 6.🧩 Nisha bought 5 mangoes and a bag for ₹180 in all. Each mango cost the same. What did one mango cost? (a) ₹175 (b) ₹36 (c) not enough info (d) ₹180
7. 7.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
8. 8.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 5 (b) not enough info (c) 10 (d) 50
9. 9.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
10. 10.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) not enough info (b) 60 (c) 12 (d) 6
11. 11.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 8 (b) not enough info (c) 40 (d) 4
12. 12.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 5 PM (c) 8 PM (d) 7 PM
13. 13.🧩 Diya bought 3 balls and a water bottle for ₹180 in all. Each ball cost the same. What did one ball cost? (a) ₹180 (b) ₹60 (c) ₹177 (d) not enough info
14. 14.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
15. 15.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
16. 16.🧩 A box has 8 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 14 (b) 54 (c) 48 (d) not enough info
17. 17.🧩 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
18. 18.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
19. 19.🥭 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) no mango is sweet (d) yes, mangoes match
20. 20.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
21. 21.🧩 Tara is 7 years old. Aarav is older than Tara. How old is Aarav? (a) 9 (b) 12 (c) 8 (d) not enough info
22. 22.🧩 Arjun bought 2 markers for ₹70 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹40 (c) ₹70 (d) ₹35
23. 23.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
24. 24.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 9 PM (d) 7 PM
25. 25.🧩 A box has 6 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) not enough info (b) 10 (c) 28 (d) 24
26. 26.🧩 A box has 7 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 12 (b) not enough info (c) 35 (d) 40
27. 27.📝 What does “evidence” mean? (a) a guess (b) facts that support it (c) a loud opinion (d) a rumour
28. 28.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
29. 29.🧩 Meera is 6 years old. Ishaan is 3 years older than Meera. How old is Ishaan? (a) not enough info (b) 10 (c) 3 (d) 9
30. 30.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
31. 31.🧩 Kabir is 6 years old. Rohan is 4 years older than Kabir. How old is Rohan? (a) not enough info (b) 4 (c) 10 (d) 11
32. 32.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
33. 33.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
34. 34.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
35. 35.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking one friend (d) asking your pet
36. 36.🧩 Aarav bought 6 notebooks and a lunch box for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) ₹180 (b) ₹174 (c) ₹30 (d) not enough info
37. 37.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
38. 38.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
39. 39.🧩 A box has 4 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 20 (b) not enough info (c) 25 (d) 9
40. 40.🧩 Arjun is 12 years old. Saanvi is 2 years older than Arjun. How old is Saanvi? (a) 14 (b) 2 (c) not enough info (d) 15

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