Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 257 · 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 asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
2. 2.🧩 A box has 6 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 56 (b) 14 (c) 48 (d) not enough info
3. 3.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
4. 4.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) never see dogs (d) that one dog barked
5. 5.🧩 Kabir bought 3 mangoes and a lunch box for ₹120 in all. Each mango cost the same. What did one mango cost? (a) ₹117 (b) ₹40 (c) not enough info (d) ₹120
6. 6.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) a rumour (d) facts that support it
7. 7.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking the whole class (d) asking one friend
8. 8.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
9. 9.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
10. 10.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
11. 11.🧩 A box has 5 rows of oranges, with 8 in each row. How many oranges are in the box? (a) not enough info (b) 48 (c) 13 (d) 40
12. 12.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
13. 13.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
14. 14.🧩 Kabir bought 6 balls and a water bottle for ₹210 in all. Each ball cost the same. What did one ball cost? (a) ₹35 (b) ₹204 (c) ₹210 (d) not enough info
15. 15.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 14 (b) not enough info (c) 70 (d) 7
16. 16.🧩 Nisha bought 5 notebooks and a water bottle for ₹245 in all. Each notebook cost the same. What did one notebook cost? (a) ₹245 (b) ₹240 (c) ₹49 (d) not enough info
17. 17.🧩 Rohan bought 2 mangoes for ₹110 in all. Each mango cost the same. What did one mango cost? (a) ₹60 (b) ₹55 (c) not enough info (d) ₹110
18. 18.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
19. 19.🧩 Aarav is 9 years old. Saanvi is 4 years older than Aarav. How old is Saanvi? (a) 4 (b) 14 (c) not enough info (d) 13
20. 20.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
21. 21.🧩 Rohan is 8 years old. Saanvi is older than Rohan. How old is Saanvi? (a) 9 (b) not enough info (c) 13 (d) 10
22. 22.🧩 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
23. 23.🧩 Kabir bought 2 balls and a lunch box for ₹140 in all. Each ball cost the same. What did one ball cost? (a) ₹70 (b) not enough info (c) ₹138 (d) ₹140
24. 24.🧩 A box has 4 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 25 (b) 9 (c) not enough info (d) 20
25. 25.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
26. 26.🧩 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
27. 27.🧩 Ishaan bought 6 kites for ₹150 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹150 (c) ₹25 (d) ₹30
28. 28.🧩 A box has 4 rows of guavas, with 5 in each row. How many guavas are in the box? (a) 9 (b) 20 (c) 25 (d) not enough info
29. 29.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to be sure of results (d) to waste time
30. 30.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
31. 31.🥭 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, check more (c) no mango is sweet (d) yes, it is certain
32. 32.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
33. 33.🧩 A box has 4 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) not enough info (b) 40 (c) 32 (d) 12
34. 34.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) not enough info (b) 18 (c) 9 (d) 90
35. 35.🧩 Ishaan is 8 years old. Ananya is older than Ishaan. How old is Ananya? (a) 9 (b) 10 (c) not enough info (d) 13
36. 36.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
37. 37.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 6 PM (c) 3 PM (d) not enough info
38. 38.🧩 Ishaan is 12 years old. Kabir is older than Ishaan. How old is Kabir? (a) 14 (b) 17 (c) not enough info (d) 13
39. 39.🧩 Tara bought 2 balls and a cap for ₹200 in all. Each ball cost the same. What did one ball cost? (a) ₹200 (b) ₹198 (c) not enough info (d) ₹100
40. 40.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False

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