Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 65 · 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.🧩 Arjun bought 3 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) ₹30 (b) ₹15 (c) ₹10 (d) not enough info
2. 2.📊 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
3. 3.🧩 Aarav is 12 years old. Arjun is older than Aarav. How old is Arjun? (a) 14 (b) 13 (c) not enough info (d) 17
4. 4.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 5 PM
5. 5.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
6. 6.🧩 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
7. 7.🧩 Aarav is 6 years old. Saanvi is 8 years older than Aarav. How old is Saanvi? (a) 15 (b) not enough info (c) 8 (d) 14
8. 8.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
9. 9.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
10. 10.🧩 A box has 4 rows of oranges, with 9 in each row. How many oranges are in the box? (a) not enough info (b) 13 (c) 45 (d) 36
11. 11.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
12. 12.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
13. 13.🧩 Saanvi bought 4 markers for ₹200 in all. Each marker cost the same. What did one marker cost? (a) ₹55 (b) ₹50 (c) not enough info (d) ₹200
14. 14.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
15. 15.🐕 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
16. 16.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) a rumour (d) facts that support it
17. 17.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 60 (b) 6 (c) not enough info (d) 12
18. 18.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
19. 19.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 8 (b) not enough info (c) 4 (d) 40
20. 20.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
21. 21.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
22. 22.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
23. 23.🧩 Saanvi is 12 years old. Aarav is older than Saanvi. How old is Aarav? (a) 17 (b) not enough info (c) 13 (d) 14
24. 24.🧩 A box of oranges has 9 in each row. How many oranges are in the box? (a) 90 (b) 9 (c) 18 (d) not enough info
25. 25.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to change answers (d) to be sure of results
26. 26.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the page number (d) the colour of ink
27. 27.🥭 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) yes, it is certain (d) no, check more
28. 28.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
29. 29.🧩 Ananya is 6 years old. Nisha is older than Ananya. How old is Nisha? (a) 7 (b) not enough info (c) 11 (d) 8
30. 30.🧩 Kabir is 10 years old. Vihaan is 7 years older than Kabir. How old is Vihaan? (a) 17 (b) not enough info (c) 18 (d) 7
31. 31.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 40 (b) 4 (c) 8 (d) not enough info
32. 32.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
33. 33.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
34. 34.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
35. 35.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 8 PM
36. 36.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
37. 37.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) not enough info (b) 90 (c) 18 (d) 9
38. 38.🧩 Nisha bought 3 mangoes for ₹180 in all. Each mango cost the same. What did one mango cost? (a) ₹180 (b) not enough info (c) ₹60 (d) ₹65
39. 39.🧩 Meera bought 6 mangoes for ₹300 in all. Each mango cost the same. What did one mango cost? (a) ₹300 (b) not enough info (c) ₹55 (d) ₹50
40. 40.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) not enough info (c) 7 PM (d) 8 PM

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