Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 550 · 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.🧩 A box has 4 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 32 (b) 40 (c) 12 (d) not enough info
2. 2.🧩 Ishaan bought 3 balls and a cap for ₹135 in all. Each ball cost the same. What did one ball cost? (a) ₹135 (b) ₹132 (c) ₹45 (d) not enough info
3. 3.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
4. 4.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
5. 5.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 5 PM (d) 6 PM
6. 6.🧩 Saanvi bought 2 kites for ₹30 in all. Each kite cost the same. What did one kite cost? (a) ₹30 (b) not enough info (c) ₹15 (d) ₹20
7. 7.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
8. 8.🧩 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
9. 9.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 50 (b) 5 (c) 10 (d) not enough info
10. 10.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
11. 11.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
12. 12.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
13. 13.🧩 A box has 3 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 12 (b) 16 (c) not enough info (d) 7
14. 14.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 10 PM (b) 6 PM (c) not enough info (d) 9 PM
15. 15.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) that one dog barked (d) all dogs are mean
16. 16.🧩 Diya bought 4 notebooks for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹20 (c) ₹25 (d) ₹80
17. 17.🧩 Ananya is 9 years old. Tara is older than Ananya. How old is Tara? (a) 14 (b) 10 (c) not enough info (d) 11
18. 18.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
19. 19.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
20. 20.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
21. 21.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 4 PM (c) 2 PM (d) not enough info
22. 22.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
23. 23.🧩 Tara bought 3 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹20 (c) ₹60 (d) ₹25
24. 24.📊 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
25. 25.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
26. 26.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) not enough info (b) 12 (c) 6 (d) 60
27. 27.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) yes, it is certain (c) no, check more (d) no mango is sweet
28. 28.🧩 Ananya bought 2 notebooks for ₹40 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹25 (c) ₹20 (d) ₹40
29. 29.🧩 Vihaan is 11 years old. Saanvi is older than Vihaan. How old is Saanvi? (a) 16 (b) not enough info (c) 13 (d) 12
30. 30.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) a rumour (d) facts that support it
31. 31.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) 60 (b) 6 (c) not enough info (d) 12
32. 32.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) 6 PM (c) 5 PM (d) not enough info
33. 33.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
34. 34.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 7 PM (b) not enough info (c) 3 PM (d) 6 PM
35. 35.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
36. 36.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 6 PM
37. 37.🧩 Rohan is 7 years old. Vihaan is older than Rohan. How old is Vihaan? (a) 9 (b) 12 (c) not enough info (d) 8
38. 38.🧩 Aarav bought 2 mangoes for ₹50 in all. Each mango cost the same. What did one mango cost? (a) ₹50 (b) ₹25 (c) ₹30 (d) not enough info
39. 39.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 90 (b) 18 (c) not enough info (d) 9
40. 40.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence

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