Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 538 · 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.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) a rumour (d) facts that support it
2. 2.🧩 A box has 8 rows of apples, with 7 in each row. How many apples are in the box? (a) not enough info (b) 15 (c) 63 (d) 56
3. 3.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
4. 4.🧩 Rohan bought 3 notebooks and a bag for ₹110 in all. Each notebook cost the same. What did one notebook cost? (a) ₹110 (b) ₹36 (c) ₹107 (d) not enough info
5. 5.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
6. 6.🧩 A box has 3 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 8 (b) 20 (c) not enough info (d) 15
7. 7.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
8. 8.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 9 PM (b) not enough info (c) 5 PM (d) 8 PM
9. 9.🧩 Tara is 7 years old. Kabir is 4 years older than Tara. How old is Kabir? (a) 4 (b) 12 (c) 11 (d) not enough info
10. 10.🧩 Aarav bought 6 pens for ₹180 in all. Each pen cost the same. What did one pen cost? (a) ₹35 (b) ₹30 (c) ₹180 (d) not enough info
11. 11.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
12. 12.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
13. 13.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 5 PM (c) 4 PM (d) not enough info
14. 14.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) that one dog barked (d) dogs hate you
15. 15.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking your pet (d) asking the whole class
16. 16.🧩 Diya is 6 years old. Tara is 4 years older than Diya. How old is Tara? (a) 11 (b) not enough info (c) 4 (d) 10
17. 17.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
18. 18.🧩 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
19. 19.🧩 Aarav bought 2 balls and a cap for ₹160 in all. Each ball cost the same. What did one ball cost? (a) ₹160 (b) ₹80 (c) ₹158 (d) not enough info
20. 20.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 4 PM (c) 2 PM (d) 3 PM
21. 21.🧩 Aarav bought 5 balls for ₹75 in all. Each ball cost the same. What did one ball cost? (a) ₹15 (b) not enough info (c) ₹75 (d) ₹20
22. 22.🧩 Ananya is 9 years old. Meera is 5 years older than Ananya. How old is Meera? (a) 15 (b) 14 (c) 5 (d) not enough info
23. 23.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
24. 24.🧩 Kabir bought 3 kites and a lunch box for ₹170 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹56 (c) ₹170 (d) ₹167
25. 25.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) yes, it is certain (c) no, check more (d) no mango is sweet
26. 26.🧩 Diya bought 3 kites for ₹45 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹20 (c) ₹45 (d) ₹15
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.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to be sure of results (d) to change answers
29. 29.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
30. 30.🧩 Saanvi is 11 years old. Aarav is 8 years older than Saanvi. How old is Aarav? (a) 20 (b) 8 (c) 19 (d) not enough info
31. 31.🧩 Vihaan is 6 years old. Rohan is older than Vihaan. How old is Rohan? (a) 7 (b) not enough info (c) 11 (d) 8
32. 32.🧩 Rohan bought 6 markers for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹15 (b) ₹60 (c) not enough info (d) ₹10
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.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
35. 35.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
36. 36.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
37. 37.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
38. 38.🧩 A box has 7 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) 56 (b) 14 (c) 49 (d) not enough info
39. 39.🧩 Arjun bought 4 balls for ₹240 in all. Each ball cost the same. What did one ball cost? (a) ₹240 (b) not enough info (c) ₹65 (d) ₹60
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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