Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 549 · 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 tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
2. 2.🧩 Diya bought 3 balls and a water bottle for ₹110 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹36 (c) ₹107 (d) ₹110
3. 3.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 3 PM (c) not enough info (d) 7 PM
4. 4.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
5. 5.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
6. 6.🧩 A box has 3 rows of apples, with 6 in each row. How many apples are in the box? (a) not enough info (b) 24 (c) 18 (d) 9
7. 7.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 6 PM
8. 8.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 6 PM (c) 7 PM (d) not enough info
9. 9.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) not enough info (d) 3 PM
10. 10.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
11. 11.🥭 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
12. 12.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
13. 13.🧩 A box has 7 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 14 (b) not enough info (c) 49 (d) 56
14. 14.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
15. 15.🧩 Nisha bought 6 markers for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) not enough info (c) ₹15 (d) ₹10
16. 16.🧩 Ananya is 7 years old. Aarav is older than Ananya. How old is Aarav? (a) not enough info (b) 12 (c) 8 (d) 9
17. 17.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
18. 18.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking your pet (c) asking one friend (d) guessing
19. 19.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) facts that support it (d) a rumour
20. 20.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 14 (b) 7 (c) 70 (d) not enough info
21. 21.🧩 Rohan is 6 years old. Kabir is older than Rohan. How old is Kabir? (a) 8 (b) 7 (c) 11 (d) not enough info
22. 22.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
23. 23.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 12 (b) 60 (c) not enough info (d) 6
24. 24.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
25. 25.🧩 Tara is 6 years old. Ishaan is 5 years older than Tara. How old is Ishaan? (a) 5 (b) 12 (c) 11 (d) not enough info
26. 26.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) all dogs are mean (c) never see dogs (d) dogs hate you
27. 27.🧩 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
28. 28.🧩 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
29. 29.🧩 Rohan bought 3 kites and a water bottle for ₹160 in all. Each kite cost the same. What did one kite cost? (a) ₹160 (b) ₹157 (c) ₹53 (d) not enough info
30. 30.🧩 Aarav bought 3 markers and a bag for ₹260 in all. Each marker cost the same. What did one marker cost? (a) ₹86 (b) not enough info (c) ₹260 (d) ₹257
31. 31.🧩 A box has 6 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) not enough info (b) 28 (c) 24 (d) 10
32. 32.🧩 Tara bought 4 markers for ₹80 in all. Each marker cost the same. What did one marker cost? (a) ₹25 (b) not enough info (c) ₹80 (d) ₹20
33. 33.🧩 A box has 4 rows of apples, with 9 in each row. How many apples are in the box? (a) 45 (b) 36 (c) 13 (d) not enough info
34. 34.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
35. 35.🧩 Vihaan bought 3 balls and a lunch box for ₹185 in all. Each ball cost the same. What did one ball cost? (a) ₹185 (b) not enough info (c) ₹61 (d) ₹182
36. 36.🧩 Ananya is 11 years old. Diya is 8 years older than Ananya. How old is Diya? (a) 20 (b) not enough info (c) 8 (d) 19
37. 37.🧩 Ishaan is 9 years old. Meera is older than Ishaan. How old is Meera? (a) 14 (b) 10 (c) 11 (d) not enough info
38. 38.🧩 Rohan is 10 years old. Kabir is 5 years older than Rohan. How old is Kabir? (a) 5 (b) 16 (c) 15 (d) not enough info
39. 39.🧩 Meera is 9 years old. Tara is 5 years older than Meera. How old is Tara? (a) 5 (b) 14 (c) 15 (d) not enough info
40. 40.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False

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