Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 245 · 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.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) not enough info (b) 4 PM (c) 8 PM (d) 7 PM
2. 2.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) that one dog barked (d) all dogs are mean
3. 3.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
4. 4.🧩 Tara is 7 years old. Kabir is 8 years older than Tara. How old is Kabir? (a) 8 (b) 16 (c) not enough info (d) 15
5. 5.🧩 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
6. 6.🧩 Vihaan is 6 years old. Diya is older than Vihaan. How old is Diya? (a) 8 (b) 11 (c) 7 (d) not enough info
7. 7.🧩 Ananya bought 4 pens for ₹220 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹220 (c) ₹60 (d) ₹55
8. 8.🧩 A box has 8 rows of eggs, with 7 in each row. How many eggs are in the box? (a) 15 (b) not enough info (c) 56 (d) 63
9. 9.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
10. 10.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
11. 11.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) not enough info (b) 8 (c) 40 (d) 4
12. 12.🧩 A box has 3 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 15 (b) not enough info (c) 8 (d) 20
13. 13.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
14. 14.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to waste time (d) to be sure of results
15. 15.🧩 A box has 5 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) 20 (b) not enough info (c) 24 (d) 9
16. 16.🥭 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
17. 17.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
18. 18.🧩 Ishaan bought 3 pens and a water bottle for ₹95 in all. Each pen cost the same. What did one pen cost? (a) ₹31 (b) ₹92 (c) not enough info (d) ₹95
19. 19.🧩 Nisha is 7 years old. Vihaan is older than Nisha. How old is Vihaan? (a) 9 (b) not enough info (c) 8 (d) 12
20. 20.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
21. 21.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) asking your pet (d) guessing
22. 22.🧩 Nisha bought 5 notebooks and a bag for ₹245 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹245 (c) ₹240 (d) ₹49
23. 23.🧩 Vihaan is 11 years old. Rohan is 4 years older than Vihaan. How old is Rohan? (a) not enough info (b) 15 (c) 16 (d) 4
24. 24.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
25. 25.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
26. 26.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
27. 27.🧩 Kabir is 10 years old. Aarav is 2 years older than Kabir. How old is Aarav? (a) not enough info (b) 12 (c) 2 (d) 13
28. 28.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
29. 29.🧩 Tara is 6 years old. Kabir is older than Tara. How old is Kabir? (a) 8 (b) 7 (c) 11 (d) not enough info
30. 30.🧩 Aarav bought 2 markers for ₹100 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) ₹55 (c) not enough info (d) ₹100
31. 31.🧩 Tara bought 6 kites for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹20 (b) ₹25 (c) ₹120 (d) not enough info
32. 32.🧩 Nisha bought 6 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) ₹60 (b) ₹15 (c) ₹10 (d) not enough info
33. 33.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
34. 34.🧩 Aarav is 12 years old. Saanvi is 7 years older than Aarav. How old is Saanvi? (a) 7 (b) 20 (c) not enough info (d) 19
35. 35.🧩 Arjun is 8 years old. Ishaan is older than Arjun. How old is Ishaan? (a) not enough info (b) 10 (c) 9 (d) 13
36. 36.🧩 Aarav is 11 years old. Rohan is 5 years older than Aarav. How old is Rohan? (a) not enough info (b) 5 (c) 16 (d) 17
37. 37.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
38. 38.🧩 Saanvi is 11 years old. Kabir is older than Saanvi. How old is Kabir? (a) not enough info (b) 16 (c) 13 (d) 12
39. 39.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
40. 40.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 2 PM (c) not enough info (d) 5 PM

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