Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 906 · 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.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to waste time (d) to change answers
2. 2.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
3. 3.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
4. 4.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
5. 5.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
6. 6.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 2 PM (d) 3 PM
7. 7.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
8. 8.🥭 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) no, check more (d) yes, it is certain
9. 9.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
10. 10.🧩 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
11. 11.🧩 A box has 7 rows of oranges, with 9 in each row. How many oranges are in the box? (a) 16 (b) 72 (c) 63 (d) not enough info
12. 12.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
13. 13.🧩 Kabir is 12 years old. Diya is older than Kabir. How old is Diya? (a) 17 (b) 14 (c) 13 (d) not enough info
14. 14.🧩 Meera bought 6 kites for ₹300 in all. Each kite cost the same. What did one kite cost? (a) ₹300 (b) not enough info (c) ₹55 (d) ₹50
15. 15.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
16. 16.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 7 PM (c) 8 PM (d) not enough info
17. 17.🧩 Nisha is 10 years old. Ishaan is 8 years older than Nisha. How old is Ishaan? (a) 19 (b) 18 (c) not enough info (d) 8
18. 18.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) what facts are given (d) your handwriting
19. 19.📝 What does “evidence” mean? (a) a loud opinion (b) facts that support it (c) a guess (d) a rumour
20. 20.🧩 A box has 6 rows of eggs, with 7 in each row. How many eggs are in the box? (a) not enough info (b) 49 (c) 42 (d) 13
21. 21.🧩 A box has 3 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 15 (b) not enough info (c) 20 (d) 8
22. 22.🧩 Tara bought 6 pens for ₹330 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹60 (c) ₹330 (d) ₹55
23. 23.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) all dogs are mean (d) never see dogs
24. 24.🧩 Arjun bought 4 pens and a cap for ₹280 in all. Each pen cost the same. What did one pen cost? (a) ₹276 (b) ₹70 (c) ₹280 (d) not enough info
25. 25.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
26. 26.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 4 PM
27. 27.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 10 (b) 5 (c) 50 (d) not enough info
28. 28.🧩 Saanvi bought 3 markers and a cap for ₹210 in all. Each marker cost the same. What did one marker cost? (a) ₹207 (b) ₹210 (c) not enough info (d) ₹70
29. 29.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking the whole class (d) asking one friend
30. 30.🧩 Aarav bought 2 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) ₹45 (c) ₹90 (d) not enough info
31. 31.🧩 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
32. 32.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) not enough info (b) 5 (c) 10 (d) 50
33. 33.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
34. 34.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 8 (b) 16 (c) not enough info (d) 80
35. 35.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
36. 36.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 4 PM (c) not enough info (d) 5 PM
37. 37.🧩 Meera is 11 years old. Arjun is 3 years older than Meera. How old is Arjun? (a) not enough info (b) 3 (c) 15 (d) 14
38. 38.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 40 (b) 4 (c) 8 (d) not enough info
39. 39.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 4 PM (c) not enough info (d) 6 PM
40. 40.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 4 PM

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