Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 64 · 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.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to waste time (d) to change answers
2. 2.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking your pet (d) asking one friend
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? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
5. 5.🧩 A box has 8 rows of laddoos, with 6 in each row. How many laddoos are in the box? (a) 48 (b) 14 (c) 54 (d) not enough info
6. 6.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
7. 7.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
8. 8.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
9. 9.🧩 Ananya bought 4 pens for ₹160 in all. Each pen cost the same. What did one pen cost? (a) ₹45 (b) ₹160 (c) not enough info (d) ₹40
10. 10.🧩 A box has 3 rows of apples, with 5 in each row. How many apples are in the box? (a) 15 (b) 20 (c) not enough info (d) 8
11. 11.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a rumour (d) a loud opinion
12. 12.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
13. 13.🧩 Saanvi bought 5 notebooks for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) ₹30 (b) ₹150 (c) not enough info (d) ₹35
14. 14.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) 8 PM (c) not enough info (d) 7 PM
15. 15.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
16. 16.🧩 Tara is 10 years old. Diya is 3 years older than Tara. How old is Diya? (a) 3 (b) not enough info (c) 14 (d) 13
17. 17.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
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, mangoes match (b) no mango is sweet (c) no, check more (d) yes, it is certain
19. 19.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 4 (b) not enough info (c) 40 (d) 8
20. 20.🧩 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
21. 21.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
22. 22.🧩 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
23. 23.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
24. 24.🧩 A box of guavas has 9 in each row. How many guavas are in the box? (a) 9 (b) 90 (c) 18 (d) not enough info
25. 25.🧩 Rohan bought 2 balls and a bag for ₹120 in all. Each ball cost the same. What did one ball cost? (a) ₹118 (b) ₹120 (c) not enough info (d) ₹60
26. 26.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 5 (b) 10 (c) 50 (d) not enough info
27. 27.🧩 Saanvi is 11 years old. Ishaan is 2 years older than Saanvi. How old is Ishaan? (a) 2 (b) 13 (c) not enough info (d) 14
28. 28.🧩 Aarav is 6 years old. Rohan is older than Aarav. How old is Rohan? (a) 8 (b) not enough info (c) 7 (d) 11
29. 29.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
30. 30.🧩 Kabir bought 5 pens for ₹175 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹40 (c) ₹35 (d) ₹175
31. 31.🧩 Arjun bought 4 notebooks for ₹40 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) not enough info (c) ₹15 (d) ₹10
32. 32.🧩 Nisha bought 5 notebooks and a water bottle for ₹70 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹70 (c) ₹14 (d) ₹65
33. 33.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
34. 34.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) not enough info (b) 5 (c) 10 (d) 50
35. 35.🧩 Aarav is 7 years old. Nisha is 9 years older than Aarav. How old is Nisha? (a) not enough info (b) 9 (c) 16 (d) 17
36. 36.🧩 Ananya is 9 years old. Meera is 3 years older than Ananya. How old is Meera? (a) not enough info (b) 13 (c) 3 (d) 12
37. 37.🧩 Saanvi bought 4 markers for ₹100 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹30 (c) ₹25 (d) ₹100
38. 38.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
39. 39.🧩 Ananya is 7 years old. Rohan is older than Ananya. How old is Rohan? (a) 12 (b) 8 (c) not enough info (d) 9
40. 40.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) not enough info (c) 4 PM (d) 5 PM

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