Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 120 · 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.🧩 Aarav bought 4 kites and a water bottle for ₹200 in all. Each kite cost the same. What did one kite cost? (a) ₹196 (b) ₹200 (c) ₹50 (d) not enough info
2. 2.🧩 Diya is 9 years old. Rohan is older than Diya. How old is Rohan? (a) 14 (b) 11 (c) not enough info (d) 10
3. 3.🧩 Ananya is 7 years old. Vihaan is 8 years older than Ananya. How old is Vihaan? (a) 15 (b) 16 (c) not enough info (d) 8
4. 4.🧩 Ananya is 8 years old. Saanvi is 3 years older than Ananya. How old is Saanvi? (a) 3 (b) 12 (c) not enough info (d) 11
5. 5.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 6 PM (c) not enough info (d) 4 PM
6. 6.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
7. 7.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 6 PM (c) not enough info (d) 5 PM
8. 8.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) guessing (d) asking the whole class
9. 9.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 10 (b) not enough info (c) 50 (d) 5
10. 10.🧩 Ananya is 12 years old. Aarav is 8 years older than Ananya. How old is Aarav? (a) not enough info (b) 20 (c) 8 (d) 21
11. 11.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) not enough info (b) 3 PM (c) 5 PM (d) 4 PM
12. 12.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to waste time (d) to change answers
13. 13.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
14. 14.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
15. 15.🧩 Diya bought 4 markers and a lunch box for ₹280 in all. Each marker cost the same. What did one marker cost? (a) ₹70 (b) ₹280 (c) not enough info (d) ₹276
16. 16.🧩 Tara bought 2 notebooks for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) ₹45 (c) ₹80 (d) not enough info
17. 17.🧩 Rohan bought 3 mangoes for ₹45 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹45 (c) ₹20 (d) ₹15
18. 18.🧩 Meera is 6 years old. Diya is 2 years older than Meera. How old is Diya? (a) 9 (b) 8 (c) 2 (d) not enough info
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 loud opinion (b) a guess (c) facts that support it (d) a rumour
21. 21.🧩 Saanvi is 12 years old. Ananya is older than Saanvi. How old is Ananya? (a) 13 (b) 17 (c) not enough info (d) 14
22. 22.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
23. 23.🧩 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
24. 24.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
25. 25.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
26. 26.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
27. 27.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) dogs hate you (d) all dogs are mean
28. 28.🧩 A box has 4 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 11 (b) 35 (c) 28 (d) not enough info
29. 29.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) what facts are given (d) the page number
30. 30.🧩 Saanvi is 8 years old. Ishaan is 2 years older than Saanvi. How old is Ishaan? (a) 10 (b) 2 (c) not enough info (d) 11
31. 31.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
32. 32.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 5 PM (c) 6 PM (d) not enough info
33. 33.🧩 Nisha is 10 years old. Aarav is 8 years older than Nisha. How old is Aarav? (a) 18 (b) 19 (c) not enough info (d) 8
34. 34.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
35. 35.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
36. 36.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 3 PM (c) not enough info (d) 5 PM
37. 37.🥭 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) yes, it is certain (c) no mango is sweet (d) yes, mangoes match
38. 38.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
39. 39.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
40. 40.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False

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