Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 797 · 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.📝 What does “evidence” mean? (a) a loud opinion (b) facts that support it (c) a rumour (d) a guess
2. 2.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 9 PM (d) 8 PM
3. 3.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 3 PM (b) 6 PM (c) not enough info (d) 5 PM
4. 4.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
5. 5.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 6 PM (c) 7 PM (d) not enough info
6. 6.🧩 A box has 5 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 12 (b) not enough info (c) 35 (d) 42
7. 7.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
8. 8.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
9. 9.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
10. 10.🧩 A box has 4 rows of eggs, with 4 in each row. How many eggs are in the box? (a) not enough info (b) 8 (c) 16 (d) 20
11. 11.🧩 Diya bought 4 notebooks for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) ₹25 (b) ₹20 (c) not enough info (d) ₹80
12. 12.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the colour of ink (d) the page number
13. 13.🧩 Rohan bought 5 markers for ₹100 in all. Each marker cost the same. What did one marker cost? (a) ₹20 (b) ₹25 (c) not enough info (d) ₹100
14. 14.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
15. 15.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 5 (b) 10 (c) not enough info (d) 50
16. 16.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) 6 PM (c) 5 PM (d) not enough info
17. 17.🧩 Kabir 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
18. 18.🧩 Ananya bought 5 kites for ₹100 in all. Each kite cost the same. What did one kite cost? (a) ₹25 (b) ₹100 (c) not enough info (d) ₹20
19. 19.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
20. 20.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) 60 (b) 12 (c) not enough info (d) 6
21. 21.🧩 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
22. 22.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking the whole class (d) asking one friend
23. 23.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
24. 24.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
25. 25.🥭 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) no, check more (d) yes, it is certain
26. 26.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 3 PM (c) not enough info (d) 4 PM
27. 27.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
28. 28.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
29. 29.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
30. 30.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
31. 31.🧩 Meera bought 6 balls for ₹270 in all. Each ball cost the same. What did one ball cost? (a) ₹270 (b) ₹45 (c) not enough info (d) ₹50
32. 32.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 5 PM (c) 4 PM (d) not enough info
33. 33.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) 9 (b) 90 (c) not enough info (d) 18
34. 34.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
35. 35.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) never see dogs (d) that one dog barked
36. 36.🧩 Kabir is 9 years old. Ishaan is older than Kabir. How old is Ishaan? (a) 10 (b) not enough info (c) 11 (d) 14
37. 37.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
38. 38.🧩 A box has 7 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 35 (b) 12 (c) not enough info (d) 40
39. 39.🧩 Vihaan bought 5 pens and a lunch box for ₹205 in all. Each pen cost the same. What did one pen cost? (a) ₹41 (b) ₹205 (c) ₹200 (d) not enough info
40. 40.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 6 PM (c) 8 PM (d) not enough info

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