Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 703 · 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 your pet (b) asking the whole class (c) guessing (d) asking one friend
2. 2.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to waste time (d) to be sure of results
3. 3.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
4. 4.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
5. 5.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
6. 6.🧩 A box has 8 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) not enough info (b) 72 (c) 81 (d) 17
7. 7.🧩 Kabir is 6 years old. Nisha is 7 years older than Kabir. How old is Nisha? (a) 13 (b) 7 (c) 14 (d) not enough info
8. 8.🐕 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
9. 9.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 9 PM
10. 10.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
11. 11.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
12. 12.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
13. 13.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 4 PM (c) 5 PM (d) not enough info
14. 14.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
15. 15.🧩 Ananya is 7 years old. Nisha is older than Ananya. How old is Nisha? (a) 8 (b) 12 (c) 9 (d) not enough info
16. 16.🧩 Ishaan bought 4 kites for ₹200 in all. Each kite cost the same. What did one kite cost? (a) ₹50 (b) not enough info (c) ₹200 (d) ₹55
17. 17.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
18. 18.🧩 Rohan is 6 years old. Meera is older than Rohan. How old is Meera? (a) not enough info (b) 8 (c) 11 (d) 7
19. 19.🧩 Ishaan is 9 years old. Arjun is 4 years older than Ishaan. How old is Arjun? (a) 14 (b) 13 (c) 4 (d) not enough info
20. 20.🧩 Diya bought 2 balls and a water bottle for ₹140 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹140 (c) ₹70 (d) ₹138
21. 21.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a loud opinion (d) a guess
22. 22.🧩 Saanvi bought 3 mangoes and a cap for ₹190 in all. Each mango cost the same. What did one mango cost? (a) ₹187 (b) not enough info (c) ₹190 (d) ₹63
23. 23.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
24. 24.🥭 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
25. 25.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
26. 26.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 6 PM (d) 7 PM
27. 27.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
28. 28.🧩 A box has 8 rows of apples, with 7 in each row. How many apples are in the box? (a) not enough info (b) 15 (c) 56 (d) 63
29. 29.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
30. 30.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
31. 31.🧩 Tara is 6 years old. Vihaan is older than Tara. How old is Vihaan? (a) not enough info (b) 11 (c) 7 (d) 8
32. 32.🧩 A box has 8 rows of eggs, with 9 in each row. How many eggs are in the box? (a) not enough info (b) 72 (c) 17 (d) 81
33. 33.🧩 Ananya is 8 years old. Diya is older than Ananya. How old is Diya? (a) 10 (b) 13 (c) not enough info (d) 9
34. 34.🧩 Aarav is 11 years old. Meera is older than Aarav. How old is Meera? (a) 12 (b) 16 (c) not enough info (d) 13
35. 35.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 6 PM (c) not enough info (d) 2 PM
36. 36.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
37. 37.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 3 PM (c) 5 PM (d) not enough info
38. 38.🧩 Kabir bought 6 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹90 (b) ₹20 (c) not enough info (d) ₹15
39. 39.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
40. 40.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence

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