Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 364 · 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.🧩 Kabir bought 2 markers for ₹110 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹60 (c) ₹55 (d) ₹110
2. 2.🧩 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
3. 3.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) facts that support it (d) a rumour
4. 4.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 8 PM
5. 5.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
6. 6.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) guessing (d) asking the whole class
7. 7.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
8. 8.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
9. 9.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 3 PM (d) 7 PM
10. 10.🧩 A box has 3 rows of apples, with 9 in each row. How many apples are in the box? (a) 36 (b) 12 (c) 27 (d) not enough info
11. 11.🥭 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) yes, it is certain (c) no mango is sweet (d) no, check more
12. 12.🧩 A box of laddoos has 8 in each row. How many laddoos are in the box? (a) 80 (b) 16 (c) 8 (d) not enough info
13. 13.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
14. 14.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) not enough info (d) 4 PM
15. 15.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
16. 16.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
17. 17.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
18. 18.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) what facts are given (d) the colour of ink
19. 19.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
20. 20.🧩 Rohan bought 5 notebooks for ₹250 in all. Each notebook cost the same. What did one notebook cost? (a) ₹250 (b) ₹55 (c) ₹50 (d) not enough info
21. 21.🧩 Vihaan is 10 years old. Aarav is older than Vihaan. How old is Aarav? (a) 12 (b) 11 (c) 15 (d) not enough info
22. 22.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
23. 23.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
24. 24.🧩 Arjun bought 3 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹45 (c) ₹120 (d) ₹40
25. 25.🧩 Ishaan bought 2 pens for ₹40 in all. Each pen cost the same. What did one pen cost? (a) ₹20 (b) ₹25 (c) not enough info (d) ₹40
26. 26.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) not enough info (b) 4 PM (c) 8 PM (d) 7 PM
27. 27.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 2 PM (c) 5 PM (d) 4 PM
28. 28.🧩 Tara bought 5 kites for ₹200 in all. Each kite cost the same. What did one kite cost? (a) ₹40 (b) ₹200 (c) ₹45 (d) not enough info
29. 29.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
30. 30.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
31. 31.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
32. 32.🧩 Aarav bought 4 notebooks for ₹160 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) ₹160 (c) ₹45 (d) not enough info
33. 33.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 8 PM
34. 34.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
35. 35.🧩 Kabir bought 3 notebooks for ₹135 in all. Each notebook cost the same. What did one notebook cost? (a) ₹135 (b) not enough info (c) ₹50 (d) ₹45
36. 36.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
37. 37.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) not enough info (b) 50 (c) 5 (d) 10
38. 38.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 6 PM (b) not enough info (c) 8 PM (d) 9 PM
39. 39.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
40. 40.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 10 (b) 50 (c) 5 (d) not enough info

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