Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 349 · 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.🧩 A box has 5 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 24 (b) 9 (c) not enough info (d) 20
2. 2.🧩 A box has 6 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) not enough info (b) 11 (c) 35 (d) 30
3. 3.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
4. 4.🧩 Aarav bought 3 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) ₹25 (b) not enough info (c) ₹20 (d) ₹60
5. 5.🧩 A box has 7 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) not enough info (b) 63 (c) 16 (d) 72
6. 6.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
7. 7.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
8. 8.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 7 PM (c) not enough info (d) 8 PM
9. 9.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
10. 10.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 5 (b) 50 (c) not enough info (d) 10
11. 11.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, it is certain (c) yes, mangoes match (d) no mango is sweet
12. 12.🧩 Meera bought 6 mangoes for ₹120 in all. Each mango cost the same. What did one mango cost? (a) ₹120 (b) not enough info (c) ₹20 (d) ₹25
13. 13.🧩 Vihaan is 7 years old. Ananya is older than Vihaan. How old is Ananya? (a) 12 (b) not enough info (c) 9 (d) 8
14. 14.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
15. 15.🧩 Diya is 7 years old. Saanvi is 7 years older than Diya. How old is Saanvi? (a) 15 (b) 14 (c) 7 (d) not enough info
16. 16.🧩 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
17. 17.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
18. 18.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
19. 19.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) all dogs are mean (d) that one dog barked
20. 20.🧩 A box has 3 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 18 (b) 24 (c) not enough info (d) 9
21. 21.🧩 Rohan bought 6 mangoes and a water bottle for ₹300 in all. Each mango cost the same. What did one mango cost? (a) ₹300 (b) ₹50 (c) ₹294 (d) not enough info
22. 22.🧩 A box has 4 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 20 (b) 25 (c) 9 (d) not enough info
23. 23.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
24. 24.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
25. 25.🧩 Nisha bought 2 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹20 (c) ₹30 (d) ₹15
26. 26.🧩 Saanvi is 11 years old. Nisha is older than Saanvi. How old is Nisha? (a) 12 (b) 16 (c) 13 (d) not enough info
27. 27.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to be sure of results (d) to change answers
28. 28.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
29. 29.🧩 Meera bought 6 pens and a water bottle for ₹330 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹330 (c) ₹55 (d) ₹324
30. 30.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) 8 PM (d) not enough info
31. 31.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) guessing (d) asking your pet
32. 32.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 2 PM (c) 3 PM (d) 4 PM
33. 33.🧩 A box has 3 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) not enough info (b) 11 (c) 24 (d) 32
34. 34.🧩 Arjun is 10 years old. Diya is older than Arjun. How old is Diya? (a) 15 (b) 12 (c) 11 (d) not enough info
35. 35.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
36. 36.🧩 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
37. 37.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
38. 38.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 5 (b) 10 (c) not enough info (d) 50
39. 39.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
40. 40.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) 6 PM (c) not enough info (d) 7 PM

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