Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 464 · 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.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
2. 2.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
3. 3.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
4. 4.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) 14 (b) not enough info (c) 7 (d) 70
5. 5.🧩 Aarav bought 6 balls for ₹270 in all. Each ball cost the same. What did one ball cost? (a) ₹50 (b) ₹45 (c) ₹270 (d) not enough info
6. 6.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
7. 7.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
8. 8.🧩 Rohan bought 3 notebooks and a cap for ₹190 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹190 (c) ₹63 (d) ₹187
9. 9.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only
10. 10.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
11. 11.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
12. 12.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 7 PM (b) 3 PM (c) 6 PM (d) not enough info
13. 13.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) asking one friend (d) guessing
14. 14.🧩 Ishaan bought 2 mangoes for ₹100 in all. Each mango cost the same. What did one mango cost? (a) ₹55 (b) ₹100 (c) not enough info (d) ₹50
15. 15.🧩 Arjun is 9 years old. Saanvi is 4 years older than Arjun. How old is Saanvi? (a) 14 (b) 4 (c) 13 (d) not enough info
16. 16.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
17. 17.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) not enough info (b) 8 (c) 4 (d) 40
18. 18.🧩 A box has 3 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) not enough info (b) 21 (c) 28 (d) 10
19. 19.🧩 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
20. 20.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) a guess (d) facts that support it
21. 21.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 6 (b) not enough info (c) 60 (d) 12
22. 22.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) 9 PM (d) not enough info
23. 23.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 7 (b) 14 (c) not enough info (d) 70
24. 24.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
25. 25.🧩 Ishaan bought 3 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹45 (b) not enough info (c) ₹40 (d) ₹120
26. 26.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) the page number (d) what facts are given
27. 27.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) that one dog barked (d) never see dogs
28. 28.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 4 PM (c) not enough info (d) 5 PM
29. 29.🧩 Aarav bought 2 notebooks and a lunch box for ₹130 in all. Each notebook cost the same. What did one notebook cost? (a) ₹128 (b) ₹65 (c) ₹130 (d) not enough info
30. 30.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
31. 31.🧩 Meera is 10 years old. Rohan is 5 years older than Meera. How old is Rohan? (a) 16 (b) 5 (c) 15 (d) not enough info
32. 32.🥭 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) no mango is sweet (c) yes, mangoes match (d) yes, it is certain
33. 33.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
34. 34.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
35. 35.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
36. 36.🧩 Ishaan bought 6 balls for ₹120 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) not enough info (c) ₹120 (d) ₹25
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.🧩 Rohan is 6 years old. Meera is older than Rohan. How old is Meera? (a) 8 (b) 11 (c) 7 (d) not enough info
39. 39.🧩 Meera bought 2 balls for ₹20 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) ₹15 (c) ₹10 (d) not enough info
40. 40.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 5 PM (c) 2 PM (d) not enough info

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