Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 77 · 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.🧩 Meera bought 5 mangoes for ₹250 in all. Each mango cost the same. What did one mango cost? (a) ₹50 (b) not enough info (c) ₹55 (d) ₹250
2. 2.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
3. 3.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 3 PM (b) 5 PM (c) not enough info (d) 6 PM
4. 4.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 6 (b) 12 (c) 60 (d) not enough info
5. 5.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 6 PM
6. 6.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
7. 7.🧩 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
8. 8.🧩 A box has 4 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) not enough info (b) 16 (c) 20 (d) 8
9. 9.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 2 PM
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.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
12. 12.🧩 Nisha bought 2 markers for ₹40 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹40 (c) ₹20 (d) ₹25
13. 13.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) facts that support it (d) a guess
14. 14.🧩 Aarav bought 4 notebooks and a water bottle for ₹170 in all. Each notebook cost the same. What did one notebook cost? (a) ₹166 (b) ₹170 (c) not enough info (d) ₹42
15. 15.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
16. 16.🧩 Ananya is 7 years old. Kabir is older than Ananya. How old is Kabir? (a) 8 (b) 9 (c) 12 (d) not enough info
17. 17.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 7 PM (b) not enough info (c) 5 PM (d) 8 PM
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.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
20. 20.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 4 PM (c) 3 PM (d) not enough info
21. 21.🥭 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) no, check more (c) no mango is sweet (d) yes, mangoes match
22. 22.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) that one dog barked (d) all dogs are mean
23. 23.🧩 A box has 3 rows of guavas, with 5 in each row. How many guavas are in the box? (a) 20 (b) 15 (c) not enough info (d) 8
24. 24.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) what facts are given (d) the page number
25. 25.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
26. 26.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
27. 27.🧩 Ishaan is 6 years old. Aarav is 4 years older than Ishaan. How old is Aarav? (a) 11 (b) 10 (c) 4 (d) not enough info
28. 28.🧩 Aarav bought 2 kites for ₹90 in all. Each kite cost the same. What did one kite cost? (a) ₹45 (b) ₹90 (c) not enough info (d) ₹50
29. 29.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) not enough info (c) 8 PM (d) 7 PM
30. 30.🧩 Tara bought 4 pens for ₹140 in all. Each pen cost the same. What did one pen cost? (a) ₹40 (b) ₹140 (c) ₹35 (d) not enough info
31. 31.📊 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
32. 32.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to change answers (d) to waste time
33. 33.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
34. 34.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) not enough info (c) 5 PM (d) 4 PM
35. 35.🧩 Rohan bought 2 pens for ₹40 in all. Each pen cost the same. What did one pen cost? (a) ₹25 (b) ₹40 (c) not enough info (d) ₹20
36. 36.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
37. 37.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
38. 38.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 8 PM (c) not enough info (d) 9 PM
39. 39.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 8 (b) 16 (c) not enough info (d) 80
40. 40.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 40 (b) 4 (c) not enough info (d) 8

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