Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 581 · 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? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
2. 2.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
3. 3.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) your handwriting (d) the page number
4. 4.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
5. 5.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 2 PM (c) 4 PM (d) 3 PM
6. 6.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
7. 7.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
8. 8.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
9. 9.📊 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
10. 10.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) no, check more (c) yes, it is certain (d) yes, mangoes match
11. 11.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
12. 12.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
13. 13.🧩 A box has 8 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 17 (b) 81 (c) not enough info (d) 72
14. 14.🧩 A box has 5 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) 54 (b) 14 (c) not enough info (d) 45
15. 15.🧩 Kabir bought 3 mangoes and a bag for ₹95 in all. Each mango cost the same. What did one mango cost? (a) ₹31 (b) ₹92 (c) not enough info (d) ₹95
16. 16.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
17. 17.🧩 Arjun is 9 years old. Meera is older than Arjun. How old is Meera? (a) 14 (b) 11 (c) not enough info (d) 10
18. 18.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
19. 19.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to change answers (d) to waste time
20. 20.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
21. 21.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) facts that support it (d) a loud opinion
22. 22.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
23. 23.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
24. 24.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
25. 25.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
26. 26.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 7 PM (b) not enough info (c) 5 PM (d) 8 PM
27. 27.🧩 Ananya bought 5 notebooks and a cap for ₹145 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹29 (c) ₹145 (d) ₹140
28. 28.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
29. 29.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
30. 30.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
31. 31.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) 7 (b) 14 (c) not enough info (d) 70
32. 32.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 7 PM (d) 8 PM
33. 33.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 50 (b) 5 (c) 10 (d) not enough info
34. 34.🧩 A box has 7 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 11 (b) 32 (c) 28 (d) not enough info
35. 35.🧩 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
36. 36.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
37. 37.🧩 A box has 8 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 12 (b) not enough info (c) 36 (d) 32
38. 38.🧩 A box has 3 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 27 (b) 36 (c) 12 (d) not enough info
39. 39.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 8 (b) 4 (c) 40 (d) not enough info
40. 40.🧩 Arjun bought 6 balls and a bag for ₹110 in all. Each ball cost the same. What did one ball cost? (a) ₹110 (b) ₹18 (c) ₹104 (d) not enough info

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