Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 904 · 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? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
2. 2.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, mangoes match (c) yes, it is certain (d) no, check more
3. 3.🧩 Meera bought 3 kites and a cap for ₹160 in all. Each kite cost the same. What did one kite cost? (a) ₹157 (b) ₹160 (c) not enough info (d) ₹53
4. 4.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
5. 5.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
6. 6.🧩 Nisha bought 4 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) not enough info (c) ₹20 (d) ₹60
7. 7.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
8. 8.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
9. 9.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
10. 10.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
11. 11.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) dogs hate you (d) that one dog barked
12. 12.🧩 Meera is 9 years old. Arjun is 4 years older than Meera. How old is Arjun? (a) 14 (b) 4 (c) not enough info (d) 13
13. 13.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to be sure of results (d) to waste time
14. 14.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) your handwriting (d) the colour of ink
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.🧩 Ishaan bought 6 markers for ₹240 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹40 (c) ₹240 (d) ₹45
17. 17.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
18. 18.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) 5 PM (d) not enough info
19. 19.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 4 (b) 8 (c) not enough info (d) 40
20. 20.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 50 (b) not enough info (c) 10 (d) 5
21. 21.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
22. 22.🧩 Rohan bought 2 notebooks for ₹110 in all. Each notebook cost the same. What did one notebook cost? (a) ₹55 (b) ₹60 (c) ₹110 (d) not enough info
23. 23.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) 6 PM (c) 5 PM (d) not enough info
24. 24.🧩 Kabir is 9 years old. Arjun is 4 years older than Kabir. How old is Arjun? (a) not enough info (b) 13 (c) 14 (d) 4
25. 25.🧩 Nisha bought 5 balls and a water bottle for ₹330 in all. Each ball cost the same. What did one ball cost? (a) ₹66 (b) ₹325 (c) ₹330 (d) not enough info
26. 26.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
27. 27.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
28. 28.📊 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
29. 29.🧩 Vihaan is 10 years old. Meera is older than Vihaan. How old is Meera? (a) 11 (b) 12 (c) 15 (d) not enough info
30. 30.🧩 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
31. 31.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 9 PM (b) not enough info (c) 6 PM (d) 8 PM
32. 32.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) a guess (d) facts that support it
33. 33.🧩 Nisha bought 4 notebooks and a water bottle for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) ₹80 (c) not enough info (d) ₹76
34. 34.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
35. 35.🧩 Vihaan bought 6 notebooks and a bag for ₹230 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹230 (c) ₹224 (d) ₹38
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.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 3 PM
38. 38.🧩 Saanvi is 6 years old. Vihaan is 5 years older than Saanvi. How old is Vihaan? (a) not enough info (b) 11 (c) 5 (d) 12
39. 39.🧩 A box has 6 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 11 (b) 30 (c) 35 (d) not enough info
40. 40.🧩 A box has 4 rows of guavas, with 5 in each row. How many guavas are in the box? (a) 25 (b) 20 (c) not enough info (d) 9

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