Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 673 · 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.🧩 Kabir bought 3 notebooks and a cap for ₹200 in all. Each notebook cost the same. What did one notebook cost? (a) ₹66 (b) ₹200 (c) ₹197 (d) not enough info
2. 2.🧩 Vihaan is 8 years old. Aarav is 3 years older than Vihaan. How old is Aarav? (a) not enough info (b) 3 (c) 12 (d) 11
3. 3.🧩 A box has 6 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) 10 (b) 24 (c) 28 (d) not enough info
4. 4.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) never see dogs (d) all dogs are mean
5. 5.🧩 Rohan bought 6 kites and a lunch box for ₹320 in all. Each kite cost the same. What did one kite cost? (a) ₹320 (b) ₹53 (c) ₹314 (d) not enough info
6. 6.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
7. 7.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 8 PM (c) 7 PM (d) 5 PM
8. 8.🧩 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
9. 9.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
10. 10.🧩 Saanvi is 7 years old. Aarav is older than Saanvi. How old is Aarav? (a) 12 (b) not enough info (c) 8 (d) 9
11. 11.🧩 Rohan is 9 years old. Kabir is 6 years older than Rohan. How old is Kabir? (a) 6 (b) 16 (c) 15 (d) not enough info
12. 12.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
13. 13.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
14. 14.🧩 Ananya is 9 years old. Nisha is older than Ananya. How old is Nisha? (a) 11 (b) 14 (c) 10 (d) not enough info
15. 15.🧩 Diya is 9 years old. Tara is 9 years older than Diya. How old is Tara? (a) 9 (b) 19 (c) 18 (d) not enough info
16. 16.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) facts that support it (d) a rumour
17. 17.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
18. 18.🧩 Arjun bought 4 balls for ₹160 in all. Each ball cost the same. What did one ball cost? (a) ₹40 (b) not enough info (c) ₹45 (d) ₹160
19. 19.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) 8 (b) not enough info (c) 16 (d) 80
20. 20.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
21. 21.🥭 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) yes, it is certain (c) no, check more (d) no mango is sweet
22. 22.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) not enough info (b) 8 (c) 4 (d) 40
23. 23.🧩 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
24. 24.🧩 Aarav is 10 years old. Kabir is older than Aarav. How old is Kabir? (a) 15 (b) 12 (c) not enough info (d) 11
25. 25.🧩 Vihaan bought 4 markers for ₹160 in all. Each marker cost the same. What did one marker cost? (a) ₹160 (b) ₹45 (c) not enough info (d) ₹40
26. 26.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
27. 27.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) what facts are given (d) the colour of ink
28. 28.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
29. 29.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
30. 30.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 2 PM (c) 3 PM (d) not enough info
31. 31.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) guessing (d) asking one friend
32. 32.🧩 Ishaan is 8 years old. Tara is 3 years older than Ishaan. How old is Tara? (a) not enough info (b) 3 (c) 12 (d) 11
33. 33.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 4 PM (c) not enough info (d) 5 PM
34. 34.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) 7 PM (c) 8 PM (d) not enough info
35. 35.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 9 PM (c) not enough info (d) 8 PM
36. 36.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
37. 37.🧩 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
38. 38.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
39. 39.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) for fun only (d) to waste time
40. 40.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence

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