Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 414 · 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.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) 3 PM (c) not enough info (d) 4 PM
2. 2.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
3. 3.🧩 Rohan bought 5 balls and a bag for ₹155 in all. Each ball cost the same. What did one ball cost? (a) ₹31 (b) ₹150 (c) not enough info (d) ₹155
4. 4.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
5. 5.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
6. 6.🧩 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
7. 7.🧩 A box has 8 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 14 (b) 54 (c) 48 (d) not enough info
8. 8.🧩 Diya bought 5 pens and a lunch box for ₹180 in all. Each pen cost the same. What did one pen cost? (a) ₹180 (b) ₹36 (c) not enough info (d) ₹175
9. 9.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) dogs hate you (d) never see dogs
10. 10.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 4 PM (c) not enough info (d) 5 PM
11. 11.🧩 A box has 3 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 7 (b) 16 (c) not enough info (d) 12
12. 12.🧩 Before solving a word problem, first check… (a) the colour of ink (b) the page number (c) your handwriting (d) what facts are given
13. 13.🧩 Vihaan bought 5 pens for ₹125 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹125 (c) ₹25 (d) ₹30
14. 14.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
15. 15.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 5 PM (c) 4 PM (d) not enough info
16. 16.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
17. 17.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 9 PM (c) 8 PM (d) not enough info
18. 18.🧩 Diya is 12 years old. Meera is older than Diya. How old is Meera? (a) 17 (b) not enough info (c) 13 (d) 14
19. 19.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
20. 20.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
21. 21.🧩 Meera bought 2 mangoes for ₹40 in all. Each mango cost the same. What did one mango cost? (a) ₹25 (b) ₹40 (c) ₹20 (d) not enough info
22. 22.🥭 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, mangoes match (d) yes, it is certain
23. 23.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 8 PM
24. 24.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
25. 25.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
26. 26.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to waste time (d) to change answers
27. 27.🧩 Meera bought 5 markers for ₹50 in all. Each marker cost the same. What did one marker cost? (a) ₹15 (b) ₹50 (c) ₹10 (d) not enough info
28. 28.🧩 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
29. 29.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
30. 30.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking your pet (c) guessing (d) asking one friend
31. 31.🧩 A box has 8 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) not enough info (b) 32 (c) 12 (d) 36
32. 32.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
33. 33.🧩 Arjun is 9 years old. Ananya is 2 years older than Arjun. How old is Ananya? (a) not enough info (b) 2 (c) 11 (d) 12
34. 34.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
35. 35.🧩 Kabir is 8 years old. Aarav is older than Kabir. How old is Aarav? (a) not enough info (b) 9 (c) 10 (d) 13
36. 36.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
37. 37.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
38. 38.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
39. 39.🧩 Arjun bought 6 notebooks for ₹270 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) ₹45 (c) not enough info (d) ₹270
40. 40.🧩 Aarav bought 6 pens for ₹360 in all. Each pen cost the same. What did one pen cost? (a) ₹360 (b) ₹65 (c) ₹60 (d) not enough info

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