Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 182 · 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.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) your handwriting (d) what facts are given
2. 2.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) yes, it is certain (c) no, check more (d) no mango is sweet
3. 3.🧩 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
4. 4.🧩 A box has 5 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 30 (b) not enough info (c) 25 (d) 10
5. 5.🧩 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
6. 6.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
7. 7.🧩 A box has 7 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 40 (b) 12 (c) not enough info (d) 35
8. 8.🧩 Rohan is 12 years old. Ananya is 4 years older than Rohan. How old is Ananya? (a) not enough info (b) 17 (c) 16 (d) 4
9. 9.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
10. 10.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) not enough info (b) 8 (c) 16 (d) 80
11. 11.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
12. 12.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
13. 13.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 5 PM
14. 14.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking the whole class (d) asking one friend
15. 15.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 90 (b) not enough info (c) 9 (d) 18
16. 16.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 2 PM (b) 5 PM (c) 4 PM (d) not enough info
17. 17.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
18. 18.🧩 Aarav bought 3 balls for ₹135 in all. Each ball cost the same. What did one ball cost? (a) ₹50 (b) ₹135 (c) ₹45 (d) not enough info
19. 19.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 5 PM (d) 3 PM
20. 20.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 7 PM
21. 21.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to be sure of results (d) to change answers
22. 22.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
23. 23.🧩 Saanvi bought 4 pens for ₹200 in all. Each pen cost the same. What did one pen cost? (a) ₹200 (b) ₹50 (c) not enough info (d) ₹55
24. 24.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) not enough info (c) 6 PM (d) 7 PM
25. 25.🧩 Saanvi bought 2 kites and a bag for ₹120 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹118 (c) ₹120 (d) ₹60
26. 26.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
27. 27.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) a guess (d) facts that support it
28. 28.🧩 Meera is 8 years old. Aarav is older than Meera. How old is Aarav? (a) not enough info (b) 9 (c) 10 (d) 13
29. 29.🧩 Ananya bought 5 markers and a water bottle for ₹245 in all. Each marker cost the same. What did one marker cost? (a) ₹49 (b) not enough info (c) ₹240 (d) ₹245
30. 30.🧩 A box has 5 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 48 (b) 13 (c) 40 (d) not enough info
31. 31.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
32. 32.🧩 A box has 4 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) 45 (b) 36 (c) 13 (d) not enough info
33. 33.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) all dogs are mean (d) dogs hate you
34. 34.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 10 (b) not enough info (c) 5 (d) 50
35. 35.🧩 Arjun bought 6 pens and a bag for ₹390 in all. Each pen cost the same. What did one pen cost? (a) ₹384 (b) ₹390 (c) not enough info (d) ₹65
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.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 9 PM (d) 10 PM
38. 38.🧩 Kabir bought 6 markers for ₹240 in all. Each marker cost the same. What did one marker cost? (a) ₹40 (b) ₹45 (c) not enough info (d) ₹240
39. 39.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
40. 40.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

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