Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 21 · 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.🧩 Ishaan is 11 years old. Rohan is older than Ishaan. How old is Rohan? (a) 16 (b) not enough info (c) 12 (d) 13
2. 2.🧩 Kabir bought 4 notebooks and a bag for ₹110 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹106 (c) ₹27 (d) ₹110
3. 3.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
4. 4.🧩 A box has 4 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 10 (b) 30 (c) 24 (d) not enough info
5. 5.🧩 Aarav bought 5 kites and a cap for ₹285 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹285 (c) ₹57 (d) ₹280
6. 6.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) no, check more (c) yes, mangoes match (d) yes, it is certain
7. 7.🧩 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
8. 8.🧩 A box has 4 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) not enough info (b) 20 (c) 9 (d) 25
9. 9.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
10. 10.🧩 Vihaan is 7 years old. Saanvi is 9 years older than Vihaan. How old is Saanvi? (a) not enough info (b) 16 (c) 9 (d) 17
11. 11.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
12. 12.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) not enough info (b) 6 PM (c) 3 PM (d) 7 PM
13. 13.🧩 Vihaan is 11 years old. Rohan is 9 years older than Vihaan. How old is Rohan? (a) 9 (b) 21 (c) 20 (d) not enough info
14. 14.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) not enough info (c) 7 PM (d) 8 PM
15. 15.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
16. 16.🧩 A box has 3 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 21 (b) 10 (c) 28 (d) not enough info
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.🧩 Nisha bought 3 kites and a cap for ₹125 in all. Each kite cost the same. What did one kite cost? (a) ₹122 (b) not enough info (c) ₹125 (d) ₹41
19. 19.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 6 PM (c) not enough info (d) 7 PM
20. 20.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 5 PM
21. 21.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
22. 22.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to be sure of results (d) to change answers
23. 23.🧩 Arjun bought 2 markers and a cap for ₹70 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹68 (c) ₹35 (d) ₹70
24. 24.🧩 Diya bought 6 notebooks for ₹210 in all. Each notebook cost the same. What did one notebook cost? (a) ₹35 (b) not enough info (c) ₹210 (d) ₹40
25. 25.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
26. 26.🧩 Aarav is 11 years old. Kabir is older than Aarav. How old is Kabir? (a) 13 (b) not enough info (c) 16 (d) 12
27. 27.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) facts that support it (d) a rumour
28. 28.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
29. 29.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
30. 30.🧩 Aarav bought 3 balls and a water bottle for ₹250 in all. Each ball cost the same. What did one ball cost? (a) ₹247 (b) ₹250 (c) not enough info (d) ₹83
31. 31.🧩 A box has 4 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) not enough info (b) 35 (c) 11 (d) 28
32. 32.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
33. 33.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) not enough info (b) 6 PM (c) 8 PM (d) 7 PM
34. 34.🧩 A box has 6 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) 63 (b) 54 (c) not enough info (d) 15
35. 35.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 90 (b) 9 (c) not enough info (d) 18
36. 36.🧩 Saanvi bought 3 balls for ₹30 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹15 (c) ₹10 (d) ₹30
37. 37.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
38. 38.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
39. 39.🧩 Kabir bought 6 balls for ₹150 in all. Each ball cost the same. What did one ball cost? (a) ₹150 (b) ₹25 (c) ₹30 (d) not enough info
40. 40.🧩 Vihaan bought 4 kites and a lunch box for ₹150 in all. Each kite cost the same. What did one kite cost? (a) ₹146 (b) not enough info (c) ₹37 (d) ₹150

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