Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 794 · 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 tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
2. 2.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
3. 3.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
4. 4.🥭 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) yes, mangoes match (c) no mango is sweet (d) no, check more
5. 5.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) not enough info (c) 5 PM (d) 4 PM
6. 6.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
7. 7.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
8. 8.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
9. 9.🧩 A box has 8 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 14 (b) 54 (c) 48 (d) not enough info
10. 10.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
11. 11.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) not enough info (c) 5 PM (d) 4 PM
12. 12.🧩 Arjun bought 3 pens and a bag for ₹185 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹185 (c) ₹182 (d) ₹61
13. 13.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
14. 14.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a loud opinion (d) a guess
15. 15.🧩 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
16. 16.🧩 Ishaan bought 2 mangoes for ₹110 in all. Each mango cost the same. What did one mango cost? (a) ₹60 (b) ₹55 (c) ₹110 (d) not enough info
17. 17.🧩 Aarav bought 6 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) not enough info (c) ₹90 (d) ₹20
18. 18.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
19. 19.🧩 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
20. 20.🧩 Vihaan bought 3 markers and a cap for ₹205 in all. Each marker cost the same. What did one marker cost? (a) ₹205 (b) ₹68 (c) ₹202 (d) not enough info
21. 21.🧩 Ananya bought 2 notebooks and a bag for ₹40 in all. Each notebook cost the same. What did one notebook cost? (a) ₹38 (b) ₹20 (c) ₹40 (d) not enough info
22. 22.🧩 Kabir is 9 years old. Aarav is 5 years older than Kabir. How old is Aarav? (a) 5 (b) 14 (c) not enough info (d) 15
23. 23.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
24. 24.🧩 Diya bought 5 pens and a cap for ₹370 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹74 (c) ₹365 (d) ₹370
25. 25.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
26. 26.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
27. 27.🧩 Nisha bought 2 balls and a cap for ₹90 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹45 (c) ₹88 (d) ₹90
28. 28.🧩 Tara bought 2 pens for ₹40 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹40 (c) ₹20 (d) ₹25
29. 29.🧩 Meera bought 4 notebooks and a water bottle for ₹270 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹270 (c) ₹67 (d) ₹266
30. 30.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
31. 31.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 4 PM
32. 32.🧩 Arjun bought 6 pens and a water bottle for ₹140 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹140 (c) ₹134 (d) ₹23
33. 33.🧩 Nisha bought 5 notebooks for ₹175 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) ₹175 (c) not enough info (d) ₹35
34. 34.🧩 Meera is 7 years old. Diya is 2 years older than Meera. How old is Diya? (a) 2 (b) 10 (c) 9 (d) not enough info
35. 35.🧩 Vihaan is 9 years old. Aarav is 5 years older than Vihaan. How old is Aarav? (a) 14 (b) 15 (c) 5 (d) not enough info
36. 36.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 7 PM (d) 6 PM
37. 37.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
38. 38.🧩 Kabir bought 6 pens and a cap for ₹270 in all. Each pen cost the same. What did one pen cost? (a) ₹270 (b) ₹264 (c) not enough info (d) ₹45
39. 39.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 6 PM (c) not enough info (d) 7 PM
40. 40.🧩 Vihaan bought 5 balls for ₹300 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹300 (c) ₹60 (d) ₹65

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