Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 455 · 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.🧩 Kabir bought 3 mangoes and a cap for ₹110 in all. Each mango cost the same. What did one mango cost? (a) ₹107 (b) ₹110 (c) ₹36 (d) not enough info
2. 2.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
3. 3.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
4. 4.🧩 Vihaan is 7 years old. Ishaan is older than Vihaan. How old is Ishaan? (a) 9 (b) 8 (c) 12 (d) not enough info
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 tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
7. 7.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
8. 8.🧩 Kabir is 7 years old. Meera is 2 years older than Kabir. How old is Meera? (a) not enough info (b) 9 (c) 2 (d) 10
9. 9.🧩 Arjun bought 4 balls for ₹200 in all. Each ball cost the same. What did one ball cost? (a) ₹200 (b) ₹55 (c) not enough info (d) ₹50
10. 10.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
11. 11.🧩 Ananya bought 6 markers and a water bottle for ₹150 in all. Each marker cost the same. What did one marker cost? (a) ₹144 (b) not enough info (c) ₹25 (d) ₹150
12. 12.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) guessing (d) asking one friend
13. 13.🧩 Arjun is 11 years old. Aarav is older than Arjun. How old is Aarav? (a) 13 (b) 16 (c) 12 (d) not enough info
14. 14.🧩 A box has 8 rows of oranges, with 8 in each row. How many oranges are in the box? (a) not enough info (b) 72 (c) 64 (d) 16
15. 15.🧩 Diya bought 3 mangoes and a bag for ₹225 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹75 (c) ₹222 (d) ₹225
16. 16.🐕 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
17. 17.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
18. 18.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) 12 (b) 6 (c) not enough info (d) 60
19. 19.🧩 A box has 3 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) 7 (b) not enough info (c) 16 (d) 12
20. 20.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
21. 21.🧩 A box has 7 rows of apples, with 6 in each row. How many apples are in the box? (a) 42 (b) 13 (c) 48 (d) not enough info
22. 22.🧩 Arjun is 11 years old. Rohan is 9 years older than Arjun. How old is Rohan? (a) 21 (b) 9 (c) not enough info (d) 20
23. 23.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
24. 24.🧩 Rohan bought 2 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) ₹30 (b) ₹35 (c) not enough info (d) ₹60
25. 25.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 5 PM (c) 2 PM (d) 4 PM
26. 26.🧩 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
27. 27.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 5 PM
28. 28.🧩 Rohan bought 4 kites for ₹180 in all. Each kite cost the same. What did one kite cost? (a) ₹180 (b) ₹50 (c) ₹45 (d) not enough info
29. 29.🧩 A box has 5 rows of apples, with 7 in each row. How many apples are in the box? (a) 42 (b) not enough info (c) 35 (d) 12
30. 30.🧩 A box has 3 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 12 (b) not enough info (c) 36 (d) 27
31. 31.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
32. 32.🥭 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) no mango is sweet (c) yes, mangoes match (d) yes, it is certain
33. 33.🧩 Aarav bought 3 balls and a lunch box for ₹110 in all. Each ball cost the same. What did one ball cost? (a) ₹36 (b) ₹107 (c) ₹110 (d) not enough info
34. 34.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
35. 35.🧩 Aarav is 11 years old. Ananya is 7 years older than Aarav. How old is Ananya? (a) not enough info (b) 18 (c) 19 (d) 7
36. 36.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) not enough info (b) 7 PM (c) 3 PM (d) 6 PM
37. 37.🧩 Tara bought 5 kites for ₹150 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹30 (c) ₹150 (d) ₹35
38. 38.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
39. 39.🧩 Diya is 12 years old. Aarav is 5 years older than Diya. How old is Aarav? (a) 18 (b) 5 (c) not enough info (d) 17
40. 40.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False

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