Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 305 · 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.🧩 Tara bought 2 balls for ₹90 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹50 (c) ₹45 (d) ₹90
2. 2.🧩 Meera bought 5 mangoes and a water bottle for ₹315 in all. Each mango cost the same. What did one mango cost? (a) ₹310 (b) not enough info (c) ₹63 (d) ₹315
3. 3.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
4. 4.🧩 A box of oranges has 9 in each row. How many oranges are in the box? (a) not enough info (b) 90 (c) 18 (d) 9
5. 5.🧩 Diya bought 3 mangoes and a water bottle for ₹200 in all. Each mango cost the same. What did one mango cost? (a) ₹66 (b) ₹197 (c) not enough info (d) ₹200
6. 6.🧩 Rohan bought 5 notebooks and a water bottle for ₹220 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹215 (c) ₹44 (d) ₹220
7. 7.🧩 A box has 8 rows of eggs, with 5 in each row. How many eggs are in the box? (a) not enough info (b) 40 (c) 13 (d) 45
8. 8.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
9. 9.🥭 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) no mango is sweet (d) yes, mangoes match
10. 10.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
11. 11.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) a guess (d) facts that support it
12. 12.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
13. 13.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to be sure of results (d) to waste time
14. 14.🧩 Diya is 11 years old. Vihaan is 3 years older than Diya. How old is Vihaan? (a) 15 (b) 3 (c) not enough info (d) 14
15. 15.🧩 Arjun is 8 years old. Kabir is 8 years older than Arjun. How old is Kabir? (a) 8 (b) not enough info (c) 16 (d) 17
16. 16.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) all dogs are mean (d) that one dog barked
17. 17.🧩 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
18. 18.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
19. 19.🧩 Diya bought 2 notebooks and a water bottle for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹88 (b) not enough info (c) ₹45 (d) ₹90
20. 20.🧩 Arjun is 8 years old. Ananya is older than Arjun. How old is Ananya? (a) 9 (b) 10 (c) 13 (d) not enough info
21. 21.🧩 Diya bought 6 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) ₹15 (b) ₹60 (c) ₹10 (d) not enough info
22. 22.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 9 PM (b) not enough info (c) 8 PM (d) 6 PM
23. 23.🧩 Saanvi bought 3 pens for ₹90 in all. Each pen cost the same. What did one pen cost? (a) ₹90 (b) ₹30 (c) ₹35 (d) not enough info
24. 24.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
25. 25.🧩 Ishaan is 11 years old. Ananya is 5 years older than Ishaan. How old is Ananya? (a) 5 (b) 16 (c) 17 (d) not enough info
26. 26.🧩 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
27. 27.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
28. 28.🧩 Diya bought 3 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) not enough info (c) ₹25 (d) ₹60
29. 29.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) not enough info (b) 4 (c) 40 (d) 8
30. 30.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
31. 31.📊 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
32. 32.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 3 PM (b) 6 PM (c) not enough info (d) 7 PM
33. 33.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) 3 PM (c) not enough info (d) 4 PM
34. 34.🧩 A box has 4 rows of eggs, with 7 in each row. How many eggs are in the box? (a) 28 (b) not enough info (c) 11 (d) 35
35. 35.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
36. 36.🧩 Kabir bought 6 mangoes for ₹120 in all. Each mango cost the same. What did one mango cost? (a) ₹20 (b) ₹25 (c) not enough info (d) ₹120
37. 37.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
38. 38.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
39. 39.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
40. 40.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

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