Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 639 · 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.🥭 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 mango is sweet (d) no, check more
2. 2.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
3. 3.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
4. 4.🧩 Kabir bought 2 pens and a lunch box for ₹170 in all. Each pen cost the same. What did one pen cost? (a) ₹170 (b) ₹168 (c) not enough info (d) ₹85
5. 5.🧩 Diya bought 6 kites and a lunch box for ₹140 in all. Each kite cost the same. What did one kite cost? (a) ₹134 (b) ₹23 (c) not enough info (d) ₹140
6. 6.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) not enough info (d) 6 PM
7. 7.🧩 Aarav bought 4 balls and a lunch box for ₹230 in all. Each ball cost the same. What did one ball cost? (a) ₹230 (b) not enough info (c) ₹57 (d) ₹226
8. 8.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) all dogs are mean (d) never see dogs
9. 9.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) not enough info (b) 4 PM (c) 6 PM (d) 7 PM
10. 10.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 4 PM (c) 5 PM (d) not enough info
11. 11.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
12. 12.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
13. 13.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
14. 14.🧩 Kabir is 6 years old. Vihaan is 8 years older than Kabir. How old is Vihaan? (a) 14 (b) not enough info (c) 8 (d) 15
15. 15.🧩 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
16. 16.🧩 Ananya bought 4 balls for ₹240 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹65 (c) ₹60 (d) ₹240
17. 17.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking your pet (d) asking one friend
18. 18.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) facts that support it (d) a guess
19. 19.🧩 Saanvi is 6 years old. Ananya is 4 years older than Saanvi. How old is Ananya? (a) not enough info (b) 10 (c) 4 (d) 11
20. 20.🧩 Meera is 11 years old. Kabir is 5 years older than Meera. How old is Kabir? (a) not enough info (b) 5 (c) 17 (d) 16
21. 21.🧩 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
22. 22.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
23. 23.🧩 Ananya is 6 years old. Diya is older than Ananya. How old is Diya? (a) 8 (b) not enough info (c) 11 (d) 7
24. 24.🧩 Tara is 7 years old. Kabir is older than Tara. How old is Kabir? (a) not enough info (b) 8 (c) 12 (d) 9
25. 25.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
26. 26.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
27. 27.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to be sure of results (d) to change answers
28. 28.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
29. 29.🧩 Tara is 9 years old. Rohan is older than Tara. How old is Rohan? (a) 14 (b) not enough info (c) 10 (d) 11
30. 30.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
31. 31.🧩 Kabir bought 3 pens and a bag for ₹120 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹117 (c) ₹40 (d) ₹120
32. 32.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
33. 33.🧩 Arjun is 12 years old. Tara is 9 years older than Arjun. How old is Tara? (a) 21 (b) not enough info (c) 9 (d) 22
34. 34.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
35. 35.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
36. 36.🧩 A box has 8 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) not enough info (b) 17 (c) 81 (d) 72
37. 37.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 6 PM (c) 5 PM (d) not enough info
38. 38.🧩 Meera bought 5 balls and a cap for ₹190 in all. Each ball cost the same. What did one ball cost? (a) ₹185 (b) ₹190 (c) not enough info (d) ₹38
39. 39.🧩 A box has 3 rows of laddoos, with 6 in each row. How many laddoos are in the box? (a) 9 (b) 24 (c) not enough info (d) 18
40. 40.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence

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