Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 847 · 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.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) to change answers (d) for fun only
2. 2.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 4 PM (b) not enough info (c) 7 PM (d) 6 PM
3. 3.🧩 Vihaan is 7 years old. Aarav is 5 years older than Vihaan. How old is Aarav? (a) 13 (b) 5 (c) 12 (d) not enough info
4. 4.🧩 Aarav is 7 years old. Saanvi is 6 years older than Aarav. How old is Saanvi? (a) 6 (b) 14 (c) 13 (d) not enough info
5. 5.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) what facts are given (d) the colour of ink
6. 6.🧩 Saanvi is 10 years old. Ananya is 3 years older than Saanvi. How old is Ananya? (a) 13 (b) 14 (c) 3 (d) not enough info
7. 7.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) asking your pet (d) guessing
8. 8.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
9. 9.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 3 PM (d) 5 PM
10. 10.🧩 Aarav is 9 years old. Meera is older than Aarav. How old is Meera? (a) 14 (b) 10 (c) 11 (d) not enough info
11. 11.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 9 PM
12. 12.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
13. 13.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) not enough info (b) 3 PM (c) 6 PM (d) 7 PM
14. 14.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
15. 15.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 8 PM
16. 16.🧩 A box has 8 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 36 (b) 32 (c) 12 (d) not enough info
17. 17.🧩 A box has 3 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 16 (b) 12 (c) 7 (d) not enough info
18. 18.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
19. 19.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
20. 20.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
21. 21.🧩 Nisha bought 6 notebooks and a water bottle for ₹130 in all. Each notebook cost the same. What did one notebook cost? (a) ₹130 (b) ₹21 (c) ₹124 (d) not enough info
22. 22.🧩 A box has 8 rows of apples, with 4 in each row. How many apples are in the box? (a) 32 (b) not enough info (c) 12 (d) 36
23. 23.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
24. 24.🧩 Ananya bought 3 notebooks and a bag for ₹210 in all. Each notebook cost the same. What did one notebook cost? (a) ₹207 (b) not enough info (c) ₹70 (d) ₹210
25. 25.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
26. 26.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) that one dog barked (d) dogs hate you
27. 27.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
28. 28.🧩 Vihaan is 12 years old. Meera is older than Vihaan. How old is Meera? (a) 13 (b) not enough info (c) 14 (d) 17
29. 29.🧩 A box has 7 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) 72 (b) not enough info (c) 63 (d) 16
30. 30.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
31. 31.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 9 PM (b) not enough info (c) 5 PM (d) 8 PM
32. 32.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
33. 33.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
34. 34.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 10 PM (b) not enough info (c) 9 PM (d) 6 PM
35. 35.🧩 Aarav bought 3 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹25 (b) ₹20 (c) ₹60 (d) not enough info
36. 36.🥭 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) no mango is sweet (c) no, check more (d) yes, mangoes match
37. 37.🧩 Ananya is 7 years old. Ishaan is older than Ananya. How old is Ishaan? (a) 8 (b) 9 (c) not enough info (d) 12
38. 38.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
39. 39.🧩 Aarav bought 3 markers and a cap for ₹165 in all. Each marker cost the same. What did one marker cost? (a) ₹165 (b) ₹55 (c) not enough info (d) ₹162
40. 40.🧩 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

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