Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 371 · 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) to waste time (c) to change answers (d) for fun only
2. 2.🧩 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
3. 3.🥭 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) yes, it is certain (d) no mango is sweet
4. 4.🧩 Arjun bought 4 kites for ₹80 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹25 (c) ₹20 (d) ₹80
5. 5.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
6. 6.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
7. 7.🧩 Kabir is 7 years old. Aarav is 4 years older than Kabir. How old is Aarav? (a) 11 (b) 12 (c) 4 (d) not enough info
8. 8.🧩 A box has 3 rows of oranges, with 5 in each row. How many oranges are in the box? (a) not enough info (b) 8 (c) 20 (d) 15
9. 9.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 2 PM (b) 4 PM (c) not enough info (d) 5 PM
10. 10.🧩 Vihaan bought 5 notebooks and a lunch box for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) ₹100 (c) ₹95 (d) not enough info
11. 11.🧩 Meera bought 5 notebooks for ₹50 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) ₹10 (c) not enough info (d) ₹15
12. 12.🧩 Aarav is 12 years old. Saanvi is older than Aarav. How old is Saanvi? (a) 17 (b) not enough info (c) 13 (d) 14
13. 13.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
14. 14.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 10 (b) not enough info (c) 50 (d) 5
15. 15.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
16. 16.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 80 (b) 16 (c) not enough info (d) 8
17. 17.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
18. 18.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
19. 19.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
20. 20.🧩 Nisha bought 3 balls and a lunch box for ₹95 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹92 (c) ₹31 (d) ₹95
21. 21.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a guess (d) a rumour
22. 22.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
23. 23.🧩 Tara is 10 years old. Kabir is older than Tara. How old is Kabir? (a) not enough info (b) 12 (c) 15 (d) 11
24. 24.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
25. 25.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
26. 26.🧩 Tara bought 4 kites for ₹160 in all. Each kite cost the same. What did one kite cost? (a) ₹45 (b) ₹160 (c) not enough info (d) ₹40
27. 27.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) guessing (d) asking the whole class
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.🧩 Saanvi is 7 years old. Vihaan is older than Saanvi. How old is Vihaan? (a) 9 (b) 12 (c) 8 (d) not enough info
30. 30.🧩 Ishaan bought 3 pens and a lunch box for ₹140 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹46 (c) ₹137 (d) ₹140
31. 31.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
32. 32.🧩 Diya is 8 years old. Kabir is 5 years older than Diya. How old is Kabir? (a) not enough info (b) 14 (c) 5 (d) 13
33. 33.🧩 Arjun bought 5 kites and a lunch box for ₹250 in all. Each kite cost the same. What did one kite cost? (a) ₹250 (b) not enough info (c) ₹50 (d) ₹245
34. 34.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
35. 35.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) never see dogs (d) that one dog barked
36. 36.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
37. 37.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 18 (b) 90 (c) 9 (d) not enough info
38. 38.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
39. 39.🧩 Meera bought 6 mangoes and a water bottle for ₹360 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹354 (c) ₹360 (d) ₹60
40. 40.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 40 (b) not enough info (c) 4 (d) 8

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