Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 828 · 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.📊 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
2. 2.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
3. 3.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) yes, mangoes match (c) no, check more (d) no mango is sweet
4. 4.🧩 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
5. 5.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
6. 6.🧩 Nisha is 9 years old. Aarav is 6 years older than Nisha. How old is Aarav? (a) not enough info (b) 15 (c) 16 (d) 6
7. 7.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
8. 8.🧩 Ishaan bought 5 pens for ₹75 in all. Each pen cost the same. What did one pen cost? (a) ₹15 (b) ₹75 (c) ₹20 (d) not enough info
9. 9.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
10. 10.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
11. 11.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
12. 12.🧩 Kabir bought 3 pens for ₹45 in all. Each pen cost the same. What did one pen cost? (a) ₹45 (b) ₹15 (c) ₹20 (d) not enough info
13. 13.🧩 Diya is 10 years old. Ananya is 8 years older than Diya. How old is Ananya? (a) 18 (b) 19 (c) 8 (d) not enough info
14. 14.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 7 PM
15. 15.🧩 A box of oranges has 9 in each row. How many oranges are in the box? (a) 18 (b) 9 (c) 90 (d) not enough info
16. 16.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) 3 PM (c) not enough info (d) 4 PM
17. 17.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
18. 18.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 70 (b) 14 (c) not enough info (d) 7
19. 19.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 3 PM (d) 4 PM
20. 20.🧩 Nisha bought 5 mangoes and a cap for ₹350 in all. Each mango cost the same. What did one mango cost? (a) ₹345 (b) not enough info (c) ₹350 (d) ₹70
21. 21.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 9 PM
22. 22.🧩 Vihaan is 9 years old. Ishaan is 3 years older than Vihaan. How old is Ishaan? (a) 3 (b) 12 (c) 13 (d) not enough info
23. 23.🧩 Vihaan is 8 years old. Tara is older than Vihaan. How old is Tara? (a) 10 (b) 9 (c) 13 (d) not enough info
24. 24.🧩 Rohan bought 2 markers and a water bottle for ₹50 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹48 (c) ₹50 (d) ₹25
25. 25.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 5 (b) 10 (c) not enough info (d) 50
26. 26.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 8 (b) not enough info (c) 40 (d) 4
27. 27.🧩 Aarav bought 2 balls and a bag for ₹100 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹50 (c) ₹100 (d) ₹98
28. 28.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
29. 29.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
30. 30.🧩 Aarav is 12 years old. Meera is older than Aarav. How old is Meera? (a) 17 (b) not enough info (c) 13 (d) 14
31. 31.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
32. 32.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
33. 33.🧩 Aarav bought 4 markers and a water bottle for ₹310 in all. Each marker cost the same. What did one marker cost? (a) ₹77 (b) ₹310 (c) ₹306 (d) not enough info
34. 34.🧩 A box has 7 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) not enough info (b) 32 (c) 28 (d) 11
35. 35.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only
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.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 3 PM (c) not enough info (d) 5 PM
38. 38.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 5 PM
39. 39.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
40. 40.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 3 PM (b) not enough info (c) 6 PM (d) 7 PM

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