Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 778 · 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: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
2. 2.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 4 (b) not enough info (c) 8 (d) 40
3. 3.🧩 A box has 3 rows of apples, with 5 in each row. How many apples are in the box? (a) 20 (b) not enough info (c) 15 (d) 8
4. 4.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to change answers (d) to be sure of results
5. 5.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
6. 6.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
7. 7.🧩 Ananya bought 4 markers and a water bottle for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹180 (b) ₹45 (c) ₹176 (d) not enough info
8. 8.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
9. 9.🧩 Rohan bought 4 kites and a water bottle for ₹230 in all. Each kite cost the same. What did one kite cost? (a) ₹230 (b) ₹226 (c) ₹57 (d) not enough info
10. 10.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 40 (b) not enough info (c) 4 (d) 8
11. 11.🧩 Kabir is 7 years old. Saanvi is 8 years older than Kabir. How old is Saanvi? (a) not enough info (b) 16 (c) 8 (d) 15
12. 12.🧩 Saanvi is 9 years old. Meera is 2 years older than Saanvi. How old is Meera? (a) 11 (b) not enough info (c) 2 (d) 12
13. 13.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
14. 14.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
15. 15.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the page number (d) the colour of ink
16. 16.🧩 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
17. 17.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) a guess (d) facts that support it
18. 18.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
19. 19.🧩 Meera bought 4 markers for ₹220 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) ₹220 (c) ₹55 (d) not enough info
20. 20.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) that one dog barked (d) all dogs are mean
21. 21.🧩 Arjun is 6 years old. Ananya is older than Arjun. How old is Ananya? (a) 7 (b) 11 (c) 8 (d) not enough info
22. 22.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 6 PM
23. 23.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
24. 24.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 5 PM (c) not enough info (d) 6 PM
25. 25.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) 60 (b) 6 (c) not enough info (d) 12
26. 26.🧩 A box has 8 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) 63 (b) 15 (c) not enough info (d) 56
27. 27.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
28. 28.🧩 Ishaan bought 4 mangoes and a cap for ₹240 in all. Each mango cost the same. What did one mango cost? (a) ₹240 (b) ₹236 (c) not enough info (d) ₹60
29. 29.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
30. 30.🧩 A box has 5 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 24 (b) not enough info (c) 9 (d) 20
31. 31.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
32. 32.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
33. 33.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) not enough info (c) 5 PM (d) 6 PM
34. 34.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 4 PM (c) not enough info (d) 7 PM
35. 35.🥭 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
36. 36.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
37. 37.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
38. 38.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
39. 39.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
40. 40.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 5 PM

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