Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 285 · 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 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 4 PM
2. 2.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
3. 3.🧩 Aarav bought 6 kites and a lunch box for ₹80 in all. Each kite cost the same. What did one kite cost? (a) ₹80 (b) ₹13 (c) ₹74 (d) not enough info
4. 4.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) all dogs are mean (d) never see dogs
5. 5.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
6. 6.🧩 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
7. 7.🧩 A box has 8 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 14 (b) not enough info (c) 48 (d) 54
8. 8.🧩 Kabir bought 4 notebooks and a lunch box for ₹170 in all. Each notebook cost the same. What did one notebook cost? (a) ₹42 (b) ₹166 (c) ₹170 (d) not enough info
9. 9.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) not enough info (b) 9 PM (c) 10 PM (d) 6 PM
10. 10.🧩 Kabir is 11 years old. Diya is 7 years older than Kabir. How old is Diya? (a) 19 (b) not enough info (c) 18 (d) 7
11. 11.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
12. 12.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
13. 13.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
14. 14.🧩 Saanvi is 11 years old. Nisha is older than Saanvi. How old is Nisha? (a) 13 (b) 16 (c) not enough info (d) 12
15. 15.🧩 Meera is 9 years old. Aarav is 5 years older than Meera. How old is Aarav? (a) not enough info (b) 5 (c) 14 (d) 15
16. 16.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 3 PM (d) 4 PM
17. 17.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 3 PM
18. 18.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 3 PM (c) not enough info (d) 5 PM
19. 19.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) the page number (d) your handwriting
20. 20.🧩 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
21. 21.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
22. 22.🧩 A box has 8 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 36 (b) 12 (c) 32 (d) not enough info
23. 23.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
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.🧩 Diya is 9 years old. Rohan is 7 years older than Diya. How old is Rohan? (a) 7 (b) 17 (c) 16 (d) not enough info
26. 26.🧩 Kabir bought 2 balls and a bag for ₹120 in all. Each ball cost the same. What did one ball cost? (a) ₹118 (b) ₹60 (c) ₹120 (d) not enough info
27. 27.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) guessing (d) asking the whole class
28. 28.🧩 Arjun bought 6 kites and a water bottle for ₹240 in all. Each kite cost the same. What did one kite cost? (a) ₹234 (b) ₹40 (c) ₹240 (d) not enough info
29. 29.🧩 Ananya bought 5 kites and a cap for ₹130 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹125 (c) ₹26 (d) ₹130
30. 30.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
31. 31.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
32. 32.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 6 PM (b) not enough info (c) 4 PM (d) 7 PM
33. 33.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
34. 34.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
35. 35.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) yes, mangoes match (c) no mango is sweet (d) no, check more
36. 36.🧩 Nisha is 7 years old. Ishaan is older than Nisha. How old is Ishaan? (a) 12 (b) 9 (c) not enough info (d) 8
37. 37.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
38. 38.🧩 Arjun is 9 years old. Nisha is 7 years older than Arjun. How old is Nisha? (a) 7 (b) not enough info (c) 17 (d) 16
39. 39.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) not enough info (c) 7 PM (d) 8 PM
40. 40.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to be sure of results (d) to waste time

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