Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 595 · 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 of laddoos has 9 in each row. How many laddoos are in the box? (a) not enough info (b) 9 (c) 18 (d) 90
2. 2.🧩 Nisha bought 2 markers and a cap for ₹110 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹110 (c) ₹108 (d) ₹55
3. 3.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
4. 4.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) dogs hate you (d) that one dog barked
5. 5.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
6. 6.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
7. 7.🧩 Diya bought 2 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) ₹60 (b) ₹35 (c) ₹30 (d) not enough info
8. 8.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) asking the whole class (d) guessing
9. 9.🧩 Tara bought 6 pens for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹30 (b) not enough info (c) ₹150 (d) ₹25
10. 10.🧩 Nisha is 11 years old. Kabir is 7 years older than Nisha. How old is Kabir? (a) 18 (b) 7 (c) 19 (d) not enough info
11. 11.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
12. 12.🧩 Vihaan bought 3 notebooks and a water bottle for ₹165 in all. Each notebook cost the same. What did one notebook cost? (a) ₹162 (b) ₹165 (c) ₹55 (d) not enough info
13. 13.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 5 PM (d) 6 PM
14. 14.🧩 Kabir bought 2 balls and a cap for ₹70 in all. Each ball cost the same. What did one ball cost? (a) ₹35 (b) ₹70 (c) not enough info (d) ₹68
15. 15.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 8 (b) not enough info (c) 4 (d) 40
16. 16.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) 8 PM (c) not enough info (d) 7 PM
17. 17.🧩 Vihaan bought 3 kites and a bag for ₹210 in all. Each kite cost the same. What did one kite cost? (a) ₹70 (b) ₹210 (c) not enough info (d) ₹207
18. 18.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
19. 19.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 3 PM
20. 20.🥭 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, check more (c) no mango is sweet (d) yes, mangoes match
21. 21.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
22. 22.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
23. 23.🧩 A box has 8 rows of apples, with 8 in each row. How many apples are in the box? (a) 72 (b) 16 (c) 64 (d) not enough info
24. 24.🧩 Arjun bought 4 kites and a lunch box for ₹260 in all. Each kite cost the same. What did one kite cost? (a) ₹260 (b) ₹256 (c) not enough info (d) ₹65
25. 25.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 7 PM (c) 6 PM (d) not enough info
26. 26.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
27. 27.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
28. 28.🧩 Ishaan bought 6 pens and a cap for ₹230 in all. Each pen cost the same. What did one pen cost? (a) ₹230 (b) ₹224 (c) ₹38 (d) not enough info
29. 29.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 7 PM (c) 8 PM (d) not enough info
30. 30.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
31. 31.🧩 Ishaan bought 4 pens for ₹140 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹140 (c) ₹35 (d) ₹40
32. 32.🧩 Rohan is 12 years old. Meera is older than Rohan. How old is Meera? (a) 17 (b) 14 (c) 13 (d) not enough info
33. 33.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 9 PM (b) not enough info (c) 6 PM (d) 8 PM
34. 34.🧩 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
35. 35.🧩 A box has 4 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) 13 (b) 36 (c) not enough info (d) 45
36. 36.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
37. 37.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
38. 38.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
39. 39.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) not enough info (b) 7 (c) 14 (d) 70
40. 40.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True

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