Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 768 · 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: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
2. 2.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
3. 3.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 8 (b) not enough info (c) 4 (d) 40
4. 4.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
5. 5.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
6. 6.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
7. 7.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 10 (b) 50 (c) 5 (d) not enough info
8. 8.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking your pet (d) asking one friend
9. 9.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only
10. 10.🧩 Nisha bought 3 markers and a cap for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹177 (b) ₹60 (c) ₹180 (d) not enough info
11. 11.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
12. 12.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) 4 PM (d) not enough info
13. 13.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 5 PM
14. 14.🧩 A box has 7 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 14 (b) not enough info (c) 56 (d) 49
15. 15.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) 60 (b) 12 (c) 6 (d) not enough info
16. 16.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
17. 17.🧩 Saanvi bought 5 markers and a bag for ₹360 in all. Each marker cost the same. What did one marker cost? (a) ₹72 (b) ₹355 (c) not enough info (d) ₹360
18. 18.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 5 PM (d) 6 PM
19. 19.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
20. 20.🥭 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) yes, mangoes match (c) no, check more (d) yes, it is certain
21. 21.🧩 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
22. 22.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
23. 23.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
24. 24.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 4 (b) 40 (c) 8 (d) not enough info
25. 25.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
26. 26.🧩 Ananya bought 3 mangoes and a cap for ₹130 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹130 (c) ₹43 (d) ₹127
27. 27.🧩 Ananya is 9 years old. Kabir is 9 years older than Ananya. How old is Kabir? (a) not enough info (b) 19 (c) 18 (d) 9
28. 28.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) not enough info (c) 5 PM (d) 4 PM
29. 29.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
30. 30.🧩 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
31. 31.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) facts that support it (d) a guess
32. 32.🧩 Nisha bought 6 kites and a bag for ₹440 in all. Each kite cost the same. What did one kite cost? (a) ₹440 (b) ₹73 (c) not enough info (d) ₹434
33. 33.🧩 Kabir bought 2 kites for ₹40 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹20 (c) ₹25 (d) ₹40
34. 34.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
35. 35.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
36. 36.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) never see dogs (c) all dogs are mean (d) dogs hate you
37. 37.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 8 PM (c) 7 PM (d) not enough info
38. 38.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) 7 (b) 70 (c) 14 (d) not enough info
39. 39.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
40. 40.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 90 (b) 9 (c) not enough info (d) 18

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