Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 571 · 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.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
2. 2.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
3. 3.🧩 Ishaan is 10 years old. Vihaan is older than Ishaan. How old is Vihaan? (a) 15 (b) not enough info (c) 11 (d) 12
4. 4.🧩 Diya bought 5 mangoes and a bag for ₹235 in all. Each mango cost the same. What did one mango cost? (a) ₹47 (b) ₹235 (c) not enough info (d) ₹230
5. 5.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
6. 6.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
7. 7.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 3 PM (b) 5 PM (c) 6 PM (d) not enough info
8. 8.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
9. 9.🧩 Meera is 11 years old. Vihaan is older than Meera. How old is Vihaan? (a) not enough info (b) 12 (c) 16 (d) 13
10. 10.🧩 A box has 4 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) not enough info (b) 16 (c) 20 (d) 8
11. 11.🧩 Ananya is 9 years old. Vihaan is 8 years older than Ananya. How old is Vihaan? (a) 8 (b) not enough info (c) 17 (d) 18
12. 12.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 3 PM
13. 13.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
14. 14.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a rumour (d) a guess
15. 15.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
16. 16.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
17. 17.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 8 (b) not enough info (c) 80 (d) 16
18. 18.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
19. 19.🧩 Ishaan bought 6 markers and a cap for ₹310 in all. Each marker cost the same. What did one marker cost? (a) ₹310 (b) ₹51 (c) ₹304 (d) not enough info
20. 20.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
21. 21.🧩 Arjun bought 4 mangoes and a cap for ₹80 in all. Each mango cost the same. What did one mango cost? (a) ₹20 (b) not enough info (c) ₹76 (d) ₹80
22. 22.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
23. 23.🧩 Nisha bought 5 notebooks and a lunch box for ₹315 in all. Each notebook cost the same. What did one notebook cost? (a) ₹315 (b) not enough info (c) ₹63 (d) ₹310
24. 24.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 5 (b) not enough info (c) 10 (d) 50
25. 25.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) 7 PM (d) not enough info
26. 26.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
27. 27.🧩 Meera is 11 years old. Ishaan is older than Meera. How old is Ishaan? (a) 13 (b) not enough info (c) 16 (d) 12
28. 28.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) asking one friend (d) guessing
29. 29.🧩 Vihaan bought 5 mangoes and a water bottle for ₹320 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹315 (c) ₹320 (d) ₹64
30. 30.🧩 A box has 4 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 9 (b) 25 (c) 20 (d) not enough info
31. 31.🧩 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
32. 32.🧩 Vihaan bought 2 notebooks and a lunch box for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹118 (b) not enough info (c) ₹120 (d) ₹60
33. 33.🧩 Vihaan bought 4 markers for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹120 (b) ₹35 (c) not enough info (d) ₹30
34. 34.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 6 PM (c) 7 PM (d) not enough info
35. 35.🧩 Rohan is 7 years old. Kabir is 9 years older than Rohan. How old is Kabir? (a) 17 (b) 9 (c) not enough info (d) 16
36. 36.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
37. 37.🧩 Meera bought 4 notebooks for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) ₹65 (b) ₹240 (c) not enough info (d) ₹60
38. 38.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 50 (b) 5 (c) not enough info (d) 10
39. 39.🧩 Saanvi is 6 years old. Ishaan is older than Saanvi. How old is Ishaan? (a) 8 (b) 7 (c) 11 (d) not enough info
40. 40.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False

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