Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 323 · 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.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
2. 2.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 4 PM (b) not enough info (c) 2 PM (d) 5 PM
3. 3.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 14 (b) 7 (c) not enough info (d) 70
4. 4.🧩 A box has 8 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 16 (b) 72 (c) not enough info (d) 64
5. 5.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
6. 6.🧩 Saanvi bought 5 balls and a water bottle for ₹120 in all. Each ball cost the same. What did one ball cost? (a) ₹24 (b) not enough info (c) ₹115 (d) ₹120
7. 7.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
8. 8.🧩 Kabir bought 4 mangoes for ₹160 in all. Each mango cost the same. What did one mango cost? (a) ₹40 (b) ₹45 (c) ₹160 (d) not enough info
9. 9.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
10. 10.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
11. 11.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
12. 12.🧩 A box has 8 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 12 (b) not enough info (c) 36 (d) 32
13. 13.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
14. 14.🧩 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
15. 15.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
16. 16.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 70 (b) 7 (c) 14 (d) not enough info
17. 17.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) not enough info (b) 6 (c) 60 (d) 12
18. 18.🧩 Rohan bought 2 markers and a cap for ₹100 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) ₹100 (c) not enough info (d) ₹98
19. 19.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
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.🧩 Saanvi bought 6 pens and a water bottle for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹150 (b) ₹25 (c) ₹144 (d) not enough info
22. 22.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) never see dogs (d) that one dog barked
23. 23.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
24. 24.🧩 Kabir bought 3 balls and a bag for ₹140 in all. Each ball cost the same. What did one ball cost? (a) ₹140 (b) ₹46 (c) ₹137 (d) not enough info
25. 25.🧩 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
26. 26.🧩 Aarav bought 3 balls for ₹135 in all. Each ball cost the same. What did one ball cost? (a) ₹50 (b) not enough info (c) ₹135 (d) ₹45
27. 27.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 2 PM
28. 28.🧩 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
29. 29.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) 80 (b) not enough info (c) 8 (d) 16
30. 30.🧩 Rohan bought 6 kites and a water bottle for ₹110 in all. Each kite cost the same. What did one kite cost? (a) ₹110 (b) ₹18 (c) not enough info (d) ₹104
31. 31.🧩 Vihaan is 9 years old. Arjun is older than Vihaan. How old is Arjun? (a) 14 (b) not enough info (c) 10 (d) 11
32. 32.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
33. 33.🧩 A box has 3 rows of apples, with 5 in each row. How many apples are in the box? (a) 15 (b) not enough info (c) 8 (d) 20
34. 34.🧩 A box has 3 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 24 (b) 9 (c) 18 (d) not enough info
35. 35.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
36. 36.🧩 Ishaan is 7 years old. Diya is older than Ishaan. How old is Diya? (a) 9 (b) 12 (c) not enough info (d) 8
37. 37.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
38. 38.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) the colour of ink (d) your handwriting
39. 39.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
40. 40.🧩 A box has 6 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 42 (b) 13 (c) 49 (d) not enough info

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