Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 560 · 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.🧩 Aarav bought 4 markers and a lunch box for ₹230 in all. Each marker cost the same. What did one marker cost? (a) ₹230 (b) ₹226 (c) ₹57 (d) not enough info
2. 2.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
3. 3.🧩 Kabir bought 6 pens for ₹240 in all. Each pen cost the same. What did one pen cost? (a) ₹45 (b) not enough info (c) ₹240 (d) ₹40
4. 4.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion
5. 5.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 9 (b) 90 (c) not enough info (d) 18
6. 6.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
7. 7.🧩 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
8. 8.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 3 PM (b) 5 PM (c) 6 PM (d) not enough info
9. 9.🥭 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) yes, it is certain (d) no, check more
10. 10.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 3 PM (c) 4 PM (d) not enough info
11. 11.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
12. 12.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
13. 13.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
14. 14.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) 60 (b) 6 (c) 12 (d) not enough info
15. 15.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 4 PM (d) 5 PM
16. 16.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
17. 17.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 5 PM
18. 18.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) asking the whole class (d) guessing
19. 19.🧩 Ananya bought 5 pens and a cap for ₹360 in all. Each pen cost the same. What did one pen cost? (a) ₹355 (b) ₹72 (c) ₹360 (d) not enough info
20. 20.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) 4 PM (c) not enough info (d) 3 PM
21. 21.🧩 Aarav bought 5 kites and a cap for ₹95 in all. Each kite cost the same. What did one kite cost? (a) ₹95 (b) not enough info (c) ₹19 (d) ₹90
22. 22.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) 80 (b) 16 (c) not enough info (d) 8
23. 23.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
24. 24.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
25. 25.🧩 Rohan is 12 years old. Diya is 4 years older than Rohan. How old is Diya? (a) 4 (b) 16 (c) 17 (d) not enough info
26. 26.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) 14 (b) 70 (c) 7 (d) not enough info
27. 27.🧩 Kabir bought 2 pens for ₹20 in all. Each pen cost the same. What did one pen cost? (a) ₹15 (b) ₹20 (c) ₹10 (d) not enough info
28. 28.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to be sure of results (d) to change answers
29. 29.🧩 Aarav is 10 years old. Ananya is 7 years older than Aarav. How old is Ananya? (a) 17 (b) not enough info (c) 7 (d) 18
30. 30.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 9 PM (c) 7 PM (d) 8 PM
31. 31.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
32. 32.🧩 A box has 5 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 9 (b) 24 (c) not enough info (d) 20
33. 33.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
34. 34.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 5 PM (c) not enough info (d) 6 PM
35. 35.🧩 Tara is 9 years old. Aarav is older than Tara. How old is Aarav? (a) 10 (b) not enough info (c) 14 (d) 11
36. 36.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
37. 37.🧩 Diya is 11 years old. Tara is older than Diya. How old is Tara? (a) 12 (b) 16 (c) 13 (d) not enough info
38. 38.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) 6 PM (c) 7 PM (d) not enough info
39. 39.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
40. 40.🧩 Ananya bought 2 markers and a water bottle for ₹160 in all. Each marker cost the same. What did one marker cost? (a) ₹80 (b) ₹160 (c) not enough info (d) ₹158

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