Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 173 · 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.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
2. 2.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
3. 3.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
4. 4.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 50 (b) 10 (c) not enough info (d) 5
5. 5.🥭 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) yes, mangoes match (d) no mango is sweet
6. 6.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) what facts are given (d) the page number
7. 7.🧩 Saanvi is 9 years old. Tara is 7 years older than Saanvi. How old is Tara? (a) 7 (b) 17 (c) not enough info (d) 16
8. 8.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
9. 9.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) not enough info (b) 5 PM (c) 2 PM (d) 6 PM
10. 10.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
11. 11.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
12. 12.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking the whole class (d) asking one friend
13. 13.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
14. 14.🧩 Ananya bought 4 pens for ₹240 in all. Each pen cost the same. What did one pen cost? (a) ₹65 (b) ₹60 (c) ₹240 (d) not enough info
15. 15.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) a rumour (d) facts that support it
16. 16.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
17. 17.🧩 A box has 8 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 12 (b) 36 (c) not enough info (d) 32
18. 18.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 5 PM (c) 7 PM (d) 6 PM
19. 19.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
20. 20.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 4 PM (c) 5 PM (d) not enough info
21. 21.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
22. 22.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) for fun only (d) to waste time
23. 23.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
24. 24.🧩 Saanvi bought 4 notebooks for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) ₹80 (b) ₹25 (c) ₹20 (d) not enough info
25. 25.🧩 Saanvi is 8 years old. Ishaan is older than Saanvi. How old is Ishaan? (a) 10 (b) 9 (c) not enough info (d) 13
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.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 3 PM (b) not enough info (c) 6 PM (d) 7 PM
28. 28.🧩 Ananya bought 5 pens for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹35 (b) ₹150 (c) not enough info (d) ₹30
29. 29.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 7 PM
30. 30.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 8 PM (c) 6 PM (d) not enough info
31. 31.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
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) False (b) True
33. 33.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
34. 34.🧩 Tara is 6 years old. Vihaan is older than Tara. How old is Vihaan? (a) 8 (b) not enough info (c) 7 (d) 11
35. 35.🧩 Ishaan bought 3 markers for ₹45 in all. Each marker cost the same. What did one marker cost? (a) ₹45 (b) not enough info (c) ₹20 (d) ₹15
36. 36.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
37. 37.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) not enough info (d) 3 PM
38. 38.🧩 Ananya bought 6 notebooks for ₹270 in all. Each notebook cost the same. What did one notebook cost? (a) ₹270 (b) ₹50 (c) not enough info (d) ₹45
39. 39.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) dogs hate you (d) that one dog barked
40. 40.🧩 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

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