Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 771 · 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.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
2. 2.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to change answers (d) to waste time
3. 3.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
4. 4.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
5. 5.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
6. 6.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
7. 7.🧩 Diya bought 5 notebooks and a cap for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) ₹145 (b) ₹30 (c) not enough info (d) ₹150
8. 8.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) not enough info (b) 5 PM (c) 9 PM (d) 8 PM
9. 9.🧩 Tara bought 4 markers and a cap for ₹240 in all. Each marker cost the same. What did one marker cost? (a) ₹236 (b) ₹60 (c) not enough info (d) ₹240
10. 10.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 3 PM (c) not enough info (d) 4 PM
11. 11.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
12. 12.🧩 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
13. 13.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
14. 14.📊 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
15. 15.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
16. 16.🧩 Vihaan is 8 years old. Meera is older than Vihaan. How old is Meera? (a) 10 (b) 9 (c) 13 (d) not enough info
17. 17.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
18. 18.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) 90 (b) 18 (c) not enough info (d) 9
19. 19.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) facts that support it (d) a loud opinion
20. 20.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) dogs hate you (d) that one dog barked
21. 21.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
22. 22.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 8 PM (d) 7 PM
23. 23.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
24. 24.🧩 Tara is 12 years old. Vihaan is older than Tara. How old is Vihaan? (a) 17 (b) 14 (c) not enough info (d) 13
25. 25.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
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.🧩 Diya bought 2 mangoes and a lunch box for ₹170 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹170 (c) ₹168 (d) ₹85
28. 28.🧩 A box has 6 rows of guavas, with 6 in each row. How many guavas are in the box? (a) 36 (b) 12 (c) 42 (d) not enough info
29. 29.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 3 PM (b) not enough info (c) 4 PM (d) 2 PM
30. 30.🧩 Ishaan is 11 years old. Nisha is 7 years older than Ishaan. How old is Nisha? (a) 19 (b) not enough info (c) 18 (d) 7
31. 31.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
32. 32.🧩 Nisha bought 6 pens for ₹240 in all. Each pen cost the same. What did one pen cost? (a) ₹240 (b) ₹40 (c) not enough info (d) ₹45
33. 33.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
34. 34.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 5 PM (c) 4 PM (d) 2 PM
35. 35.🧩 Saanvi bought 3 kites and a cap for ₹125 in all. Each kite cost the same. What did one kite cost? (a) ₹125 (b) ₹41 (c) ₹122 (d) not enough info
36. 36.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 5 PM (c) 7 PM (d) 8 PM
37. 37.🧩 Kabir bought 6 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) ₹15 (b) ₹10 (c) ₹60 (d) not enough info
38. 38.🥭 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, mangoes match (c) no mango is sweet (d) yes, it is certain
39. 39.🧩 Meera is 6 years old. Rohan is 3 years older than Meera. How old is Rohan? (a) 10 (b) 9 (c) 3 (d) not enough info
40. 40.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True

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