Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 475 · 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.🐕 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
2. 2.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
3. 3.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) guessing (d) asking the whole class
4. 4.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 5 PM
5. 5.🧩 Ananya is 10 years old. Saanvi is older than Ananya. How old is Saanvi? (a) 15 (b) 11 (c) 12 (d) not enough info
6. 6.🧩 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
7. 7.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) not enough info (b) 80 (c) 16 (d) 8
8. 8.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
9. 9.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 7 PM (c) 8 PM (d) not enough info
10. 10.🧩 Ishaan is 11 years old. Vihaan is older than Ishaan. How old is Vihaan? (a) 16 (b) 12 (c) 13 (d) not enough info
11. 11.🧩 Kabir bought 5 notebooks for ₹300 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹60 (c) ₹65 (d) ₹300
12. 12.🧩 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
13. 13.🧩 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
14. 14.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion
15. 15.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
16. 16.🧩 A box has 5 rows of eggs, with 8 in each row. How many eggs are in the box? (a) 13 (b) 48 (c) 40 (d) not enough info
17. 17.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
18. 18.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
19. 19.🧩 Arjun is 7 years old. Saanvi is older than Arjun. How old is Saanvi? (a) not enough info (b) 9 (c) 8 (d) 12
20. 20.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
21. 21.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) not enough info (b) 16 (c) 8 (d) 80
22. 22.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
23. 23.🧩 Saanvi bought 2 markers for ₹80 in all. Each marker cost the same. What did one marker cost? (a) ₹45 (b) ₹80 (c) ₹40 (d) not enough info
24. 24.🧩 Ishaan is 11 years old. Diya is 3 years older than Ishaan. How old is Diya? (a) not enough info (b) 15 (c) 3 (d) 14
25. 25.🧩 Ishaan bought 6 mangoes and a water bottle for ₹350 in all. Each mango cost the same. What did one mango cost? (a) ₹344 (b) ₹350 (c) ₹58 (d) not enough info
26. 26.🧩 Ishaan is 6 years old. Aarav is 4 years older than Ishaan. How old is Aarav? (a) 10 (b) 4 (c) not enough info (d) 11
27. 27.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
28. 28.🧩 A box has 7 rows of apples, with 5 in each row. How many apples are in the box? (a) not enough info (b) 40 (c) 35 (d) 12
29. 29.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 40 (b) not enough info (c) 8 (d) 4
30. 30.🧩 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
31. 31.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
32. 32.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
33. 33.🧩 Kabir bought 5 kites and a water bottle for ₹165 in all. Each kite cost the same. What did one kite cost? (a) ₹165 (b) ₹33 (c) not enough info (d) ₹160
34. 34.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
35. 35.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 9 PM (b) not enough info (c) 5 PM (d) 8 PM
36. 36.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 5 (b) 50 (c) 10 (d) not enough info
37. 37.🧩 Arjun bought 4 markers and a water bottle for ₹270 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹266 (c) ₹67 (d) ₹270
38. 38.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 5 PM (c) not enough info (d) 4 PM
39. 39.🥭 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, it is certain (d) yes, mangoes match
40. 40.🧩 A box has 6 rows of oranges, with 5 in each row. How many oranges are in the box? (a) not enough info (b) 30 (c) 35 (d) 11

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