Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 908 · 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.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking your pet (d) asking one friend
2. 2.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
3. 3.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
4. 4.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
5. 5.🧩 Aarav is 7 years old. Vihaan is 8 years older than Aarav. How old is Vihaan? (a) 8 (b) 15 (c) not enough info (d) 16
6. 6.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
7. 7.🧩 Rohan bought 6 pens and a cap for ₹320 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹53 (c) ₹320 (d) ₹314
8. 8.🧩 Tara bought 3 mangoes and a water bottle for ₹180 in all. Each mango cost the same. What did one mango cost? (a) ₹180 (b) ₹60 (c) ₹177 (d) not enough info
9. 9.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) 9 PM (d) not enough info
10. 10.🧩 Aarav is 12 years old. Tara is older than Aarav. How old is Tara? (a) 14 (b) not enough info (c) 13 (d) 17
11. 11.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the colour of ink (d) the page number
12. 12.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 3 PM (d) 5 PM
13. 13.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
14. 14.🐕 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
15. 15.🧩 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) 12 (d) 32
16. 16.🧩 Nisha bought 3 mangoes and a cap for ₹140 in all. Each mango cost the same. What did one mango cost? (a) ₹46 (b) ₹137 (c) ₹140 (d) not enough info
17. 17.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
18. 18.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a loud opinion (d) a rumour
19. 19.🧩 Ishaan bought 4 balls for ₹240 in all. Each ball cost the same. What did one ball cost? (a) ₹240 (b) ₹60 (c) not enough info (d) ₹65
20. 20.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) not enough info (b) 18 (c) 9 (d) 90
21. 21.🧩 A box has 3 rows of oranges, with 9 in each row. How many oranges are in the box? (a) 27 (b) 12 (c) 36 (d) not enough info
22. 22.🧩 Saanvi is 7 years old. Meera is 6 years older than Saanvi. How old is Meera? (a) not enough info (b) 6 (c) 14 (d) 13
23. 23.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 6 PM (c) not enough info (d) 4 PM
24. 24.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
25. 25.🥭 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
26. 26.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
27. 27.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
28. 28.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 7 PM (c) 5 PM (d) 6 PM
29. 29.🧩 Kabir is 8 years old. Ishaan is 8 years older than Kabir. How old is Ishaan? (a) 16 (b) 8 (c) not enough info (d) 17
30. 30.🧩 Rohan is 10 years old. Diya is 5 years older than Rohan. How old is Diya? (a) not enough info (b) 15 (c) 5 (d) 16
31. 31.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) not enough info (c) 4 PM (d) 5 PM
32. 32.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 5 PM (c) 6 PM (d) not enough info
33. 33.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
34. 34.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
35. 35.🧩 Tara bought 5 kites for ₹250 in all. Each kite cost the same. What did one kite cost? (a) ₹55 (b) ₹50 (c) ₹250 (d) not enough info
36. 36.🧩 Vihaan is 11 years old. Rohan is older than Vihaan. How old is Rohan? (a) 12 (b) not enough info (c) 16 (d) 13
37. 37.🧩 A box has 8 rows of apples, with 6 in each row. How many apples are in the box? (a) 48 (b) 54 (c) not enough info (d) 14
38. 38.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 3 PM (b) not enough info (c) 4 PM (d) 2 PM
39. 39.🧩 Meera bought 4 notebooks for ₹160 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) ₹45 (c) not enough info (d) ₹160
40. 40.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True

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