Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 790 · 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.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
2. 2.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
3. 3.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
4. 4.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, it is certain (c) yes, mangoes match (d) no mango is sweet
5. 5.🧩 Rohan bought 3 balls and a bag for ₹250 in all. Each ball cost the same. What did one ball cost? (a) ₹250 (b) ₹83 (c) not enough info (d) ₹247
6. 6.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
7. 7.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
8. 8.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
9. 9.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 4 PM (b) not enough info (c) 5 PM (d) 2 PM
10. 10.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to be sure of results (d) to change answers
11. 11.🧩 Diya bought 6 kites and a water bottle for ₹170 in all. Each kite cost the same. What did one kite cost? (a) ₹170 (b) ₹28 (c) ₹164 (d) not enough info
12. 12.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
13. 13.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
14. 14.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
15. 15.🧩 Diya bought 3 notebooks and a water bottle for ₹125 in all. Each notebook cost the same. What did one notebook cost? (a) ₹41 (b) ₹125 (c) not enough info (d) ₹122
16. 16.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 5 (b) not enough info (c) 10 (d) 50
17. 17.🧩 Nisha bought 3 markers for ₹90 in all. Each marker cost the same. What did one marker cost? (a) ₹35 (b) not enough info (c) ₹30 (d) ₹90
18. 18.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 2 PM (d) 5 PM
19. 19.🧩 Kabir bought 4 notebooks for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) ₹65 (b) not enough info (c) ₹240 (d) ₹60
20. 20.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) dogs hate you (d) all dogs are mean
21. 21.🧩 Tara is 7 years old. Vihaan is 3 years older than Tara. How old is Vihaan? (a) 3 (b) 11 (c) 10 (d) not enough info
22. 22.🧩 Diya bought 5 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹100 (c) ₹25 (d) ₹20
23. 23.🧩 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
24. 24.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) what facts are given (d) the colour of ink
25. 25.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion
26. 26.🧩 Tara bought 5 pens and a bag for ₹315 in all. Each pen cost the same. What did one pen cost? (a) ₹63 (b) ₹315 (c) ₹310 (d) not enough info
27. 27.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 5 PM (c) 8 PM (d) not enough info
28. 28.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
29. 29.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
30. 30.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
31. 31.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) 16 (b) 80 (c) not enough info (d) 8
32. 32.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 8 (b) 80 (c) not enough info (d) 16
33. 33.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
34. 34.🧩 Ananya bought 5 pens and a lunch box for ₹315 in all. Each pen cost the same. What did one pen cost? (a) ₹310 (b) ₹315 (c) not enough info (d) ₹63
35. 35.🧩 Ananya bought 6 balls and a lunch box for ₹220 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹214 (c) ₹36 (d) ₹220
36. 36.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) guessing (d) asking your pet
37. 37.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
38. 38.🧩 Ananya is 7 years old. Saanvi is older than Ananya. How old is Saanvi? (a) 8 (b) not enough info (c) 9 (d) 12
39. 39.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
40. 40.🧩 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

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