Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 501 · 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: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
2. 2.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
3. 3.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
4. 4.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
5. 5.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
6. 6.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) dogs hate you (d) that one dog barked
7. 7.🧩 Diya is 8 years old. Kabir is 6 years older than Diya. How old is Kabir? (a) 14 (b) 6 (c) not enough info (d) 15
8. 8.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 6 PM
9. 9.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
10. 10.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
11. 11.🧩 Rohan bought 2 markers for ₹80 in all. Each marker cost the same. What did one marker cost? (a) ₹40 (b) ₹80 (c) ₹45 (d) not enough info
12. 12.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
13. 13.🧩 Nisha is 9 years old. Aarav is 9 years older than Nisha. How old is Aarav? (a) 19 (b) not enough info (c) 18 (d) 9
14. 14.🧩 Ananya is 6 years old. Tara is older than Ananya. How old is Tara? (a) 11 (b) 7 (c) 8 (d) not enough info
15. 15.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 10 (b) not enough info (c) 50 (d) 5
16. 16.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
17. 17.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
18. 18.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking your pet (c) guessing (d) asking one friend
19. 19.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, it is certain (c) yes, mangoes match (d) no, check more
20. 20.🧩 Meera bought 2 balls for ₹50 in all. Each ball cost the same. What did one ball cost? (a) ₹50 (b) not enough info (c) ₹25 (d) ₹30
21. 21.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
22. 22.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
23. 23.🧩 Arjun bought 3 markers and a cap for ₹115 in all. Each marker cost the same. What did one marker cost? (a) ₹112 (b) not enough info (c) ₹38 (d) ₹115
24. 24.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
25. 25.🧩 A box has 3 rows of guavas, with 5 in each row. How many guavas are in the box? (a) not enough info (b) 20 (c) 15 (d) 8
26. 26.🧩 A box has 3 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 18 (b) 24 (c) 9 (d) not enough info
27. 27.🧩 Kabir bought 4 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹15 (c) ₹20 (d) ₹60
28. 28.📝 What does “evidence” mean? (a) a guess (b) facts that support it (c) a rumour (d) a loud opinion
29. 29.🧩 Ananya bought 4 markers and a water bottle for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹120 (b) not enough info (c) ₹116 (d) ₹30
30. 30.🧩 Vihaan is 6 years old. Ishaan is older than Vihaan. How old is Ishaan? (a) 7 (b) not enough info (c) 11 (d) 8
31. 31.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 2 PM (c) not enough info (d) 3 PM
32. 32.🧩 Aarav is 11 years old. Kabir is older than Aarav. How old is Kabir? (a) 16 (b) 12 (c) not enough info (d) 13
33. 33.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
34. 34.🧩 Ishaan is 9 years old. Nisha is 2 years older than Ishaan. How old is Nisha? (a) 2 (b) not enough info (c) 12 (d) 11
35. 35.🧩 Nisha bought 4 mangoes and a water bottle for ₹170 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹170 (c) ₹42 (d) ₹166
36. 36.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the page number (d) the colour of ink
37. 37.🧩 Tara bought 4 balls for ₹120 in all. Each ball cost the same. What did one ball cost? (a) ₹30 (b) ₹35 (c) not enough info (d) ₹120
38. 38.🧩 Tara bought 2 pens and a cap for ₹90 in all. Each pen cost the same. What did one pen cost? (a) ₹88 (b) not enough info (c) ₹90 (d) ₹45
39. 39.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
40. 40.🧩 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

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