Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 589 · 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.🧩 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
2. 2.🧩 Nisha bought 3 markers and a water bottle for ₹200 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹200 (c) ₹66 (d) ₹197
3. 3.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
4. 4.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
5. 5.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 6 PM (b) not enough info (c) 9 PM (d) 8 PM
6. 6.🧩 Vihaan is 7 years old. Ananya is older than Vihaan. How old is Ananya? (a) 8 (b) 12 (c) 9 (d) not enough info
7. 7.🧩 A box has 7 rows of laddoos, with 6 in each row. How many laddoos are in the box? (a) 48 (b) not enough info (c) 13 (d) 42
8. 8.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) for fun only (d) to waste time
9. 9.🧩 A box of laddoos has 8 in each row. How many laddoos are in the box? (a) 8 (b) not enough info (c) 16 (d) 80
10. 10.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
11. 11.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
12. 12.🧩 Aarav bought 3 markers and a cap for ₹75 in all. Each marker cost the same. What did one marker cost? (a) ₹75 (b) not enough info (c) ₹72 (d) ₹25
13. 13.🧩 Arjun bought 6 pens for ₹330 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) ₹330 (c) not enough info (d) ₹55
14. 14.🧩 A box has 7 rows of apples, with 8 in each row. How many apples are in the box? (a) 56 (b) 15 (c) not enough info (d) 64
15. 15.🥭 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 mango is sweet (d) no, check more
16. 16.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
17. 17.🧩 Diya is 8 years old. Meera is 8 years older than Diya. How old is Meera? (a) 17 (b) 8 (c) not enough info (d) 16
18. 18.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 6 PM (c) not enough info (d) 7 PM
19. 19.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) 8 (b) not enough info (c) 16 (d) 80
20. 20.🧩 Meera is 6 years old. Diya is older than Meera. How old is Diya? (a) 8 (b) 7 (c) not enough info (d) 11
21. 21.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
22. 22.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking one friend (d) asking the whole class
23. 23.🧩 Aarav bought 3 notebooks and a water bottle for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) ₹240 (b) ₹80 (c) not enough info (d) ₹237
24. 24.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
25. 25.🧩 Arjun bought 3 notebooks for ₹135 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) not enough info (c) ₹45 (d) ₹135
26. 26.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
27. 27.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 9 PM (c) not enough info (d) 7 PM
28. 28.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) that one dog barked (d) dogs hate you
29. 29.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
30. 30.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
31. 31.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
32. 32.🧩 Nisha is 9 years old. Saanvi is older than Nisha. How old is Saanvi? (a) 14 (b) 10 (c) not enough info (d) 11
33. 33.🧩 Diya bought 6 notebooks and a water bottle for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹120 (c) ₹114 (d) ₹20
34. 34.🧩 A box has 5 rows of eggs, with 5 in each row. How many eggs are in the box? (a) not enough info (b) 30 (c) 25 (d) 10
35. 35.🧩 Aarav bought 4 pens and a water bottle for ₹100 in all. Each pen cost the same. What did one pen cost? (a) ₹25 (b) ₹100 (c) ₹96 (d) not enough info
36. 36.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
37. 37.🧩 A box has 3 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 10 (b) not enough info (c) 28 (d) 21
38. 38.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
39. 39.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 10 (b) not enough info (c) 50 (d) 5
40. 40.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence

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