Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 845 · 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) guessing (b) asking the whole class (c) asking one friend (d) asking your pet
2. 2.🧩 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
3. 3.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
4. 4.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
5. 5.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
6. 6.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) a loud opinion (d) facts that support it
7. 7.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
8. 8.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
9. 9.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 8 (b) not enough info (c) 40 (d) 4
10. 10.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
11. 11.🧩 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
12. 12.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
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.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
15. 15.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
16. 16.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
17. 17.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
18. 18.🥭 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) no, check more (c) no mango is sweet (d) yes, mangoes match
19. 19.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
20. 20.🧩 Meera is 8 years old. Tara is older than Meera. How old is Tara? (a) 9 (b) 13 (c) not enough info (d) 10
21. 21.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 6 PM (c) not enough info (d) 5 PM
22. 22.🧩 Tara is 11 years old. Diya is 3 years older than Tara. How old is Diya? (a) 14 (b) 3 (c) 15 (d) not enough info
23. 23.🧩 Saanvi bought 3 mangoes and a cap for ₹220 in all. Each mango cost the same. What did one mango cost? (a) ₹73 (b) ₹217 (c) ₹220 (d) not enough info
24. 24.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 50 (b) not enough info (c) 10 (d) 5
25. 25.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
26. 26.🧩 Ishaan bought 4 notebooks for ₹220 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹60 (c) ₹220 (d) ₹55
27. 27.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 8 PM (d) 7 PM
28. 28.🧩 Nisha bought 3 markers and a water bottle for ₹225 in all. Each marker cost the same. What did one marker cost? (a) ₹225 (b) ₹75 (c) not enough info (d) ₹222
29. 29.🧩 Aarav is 12 years old. Rohan is 3 years older than Aarav. How old is Rohan? (a) 16 (b) 3 (c) not enough info (d) 15
30. 30.🧩 Aarav bought 4 pens for ₹40 in all. Each pen cost the same. What did one pen cost? (a) ₹15 (b) ₹10 (c) ₹40 (d) not enough info
31. 31.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) not enough info (d) 3 PM
32. 32.🧩 Diya bought 4 markers for ₹40 in all. Each marker cost the same. What did one marker cost? (a) ₹10 (b) not enough info (c) ₹40 (d) ₹15
33. 33.🧩 Meera bought 5 mangoes for ₹75 in all. Each mango cost the same. What did one mango cost? (a) ₹75 (b) ₹20 (c) not enough info (d) ₹15
34. 34.🧩 Vihaan is 9 years old. Aarav is 4 years older than Vihaan. How old is Aarav? (a) not enough info (b) 14 (c) 4 (d) 13
35. 35.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
36. 36.🧩 A box has 8 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) not enough info (b) 48 (c) 14 (d) 54
37. 37.🧩 A box has 4 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) not enough info (b) 40 (c) 12 (d) 32
38. 38.🧩 Aarav is 9 years old. Diya is 4 years older than Aarav. How old is Diya? (a) 13 (b) 4 (c) 14 (d) not enough info
39. 39.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
40. 40.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only

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